Figure 5. Twelve-month change based on final Chained Consumer Price Index for All Urban Consumers (C-CPI-U) less preliminary C-CPI-U, excludes revision chaining, 2002–12
| Index period | 
Geometric Young | 
Constant elasticity of substitution | 
| 
 Jan 2002 
 | 
0.000724 | 
-0.001272 | 
| 
 Feb 2002 
 | 
0.001090 | 
-0.001000 | 
| 
 Mar 2002 
 | 
0.001281 | 
-0.000775 | 
| 
 Apr 2002 
 | 
0.001052 | 
-0.000697 | 
| 
 May 2002 
 | 
0.000579 | 
-0.000763 | 
| 
 Jun 2002 
 | 
-0.000338 | 
-0.001784 | 
| 
 Jul 2002 
 | 
0.000187 | 
-0.001295 | 
| 
 Aug 2002 
 | 
-0.000668 | 
-0.002145 | 
| 
 Sep 2002 
 | 
0.000173 | 
-0.001173 | 
| 
 Oct 2002 
 | 
-0.000246 | 
-0.001850 | 
| 
 Nov 2002 
 | 
-0.000328 | 
-0.001787 | 
| 
 Dec 2002 
 | 
0.000086 | 
-0.001300 | 
| 
 Jan 2003 
 | 
0.000175 | 
-0.001349 | 
| 
 Feb 2003 
 | 
0.000337 | 
-0.001303 | 
| 
 Mar 2003 
 | 
0.001375 | 
-0.000554 | 
| 
 Apr 2003 
 | 
0.001450 | 
-0.000360 | 
| 
 May 2003 
 | 
0.001913 | 
0.000021 | 
| 
 Jun 2003 
 | 
0.002404 | 
0.000510 | 
| 
 Jul 2003 
 | 
0.002091 | 
0.000148 | 
| 
 Aug 2003 
 | 
0.003116 | 
0.000988 | 
| 
 Sep 2003 
 | 
0.002941 | 
0.000703 | 
| 
 Oct 2003 
 | 
0.002685 | 
0.000604 | 
| 
 Nov 2003 
 | 
0.002891 | 
0.000758 | 
| 
 Dec 2003 
 | 
0.002949 | 
0.000822 | 
| 
 Jan 2004 
 | 
0.003498 | 
0.001480 | 
| 
 Feb 2004 
 | 
0.003931 | 
0.002108 | 
| 
 Mar 2004 
 | 
0.002892 | 
0.001119 | 
| 
 Apr 2004 
 | 
0.003488 | 
0.001336 | 
| 
 May 2004 
 | 
0.003902 | 
0.001396 | 
| 
 Jun 2004 
 | 
0.003085 | 
0.000543 | 
| 
 Jul 2004 
 | 
0.002414 | 
0.000153 | 
| 
 Aug 2004 
 | 
0.001770 | 
-0.000255 | 
| 
 Sep 2004 
 | 
0.002090 | 
0.000352 | 
| 
 Oct 2004 
 | 
0.003030 | 
0.000890 | 
| 
 Nov 2004 
 | 
0.002809 | 
0.000851 | 
| 
 Dec 2004 
 | 
0.002271 | 
0.000617 | 
| 
 Jan 2005 
 | 
0.000933 | 
-0.000574 | 
| 
 Feb 2005 
 | 
0.000370 | 
-0.001230 | 
| 
 Mar 2005 
 | 
0.000087 | 
-0.001726 | 
| 
 Apr 2005 
 | 
0.000948 | 
-0.001155 | 
| 
 May 2005 
 | 
0.000083 | 
-0.001421 | 
| 
 Jun 2005 
 | 
0.000493 | 
-0.000987 | 
| 
 Jul 2005 
 | 
0.001621 | 
-0.000543 | 
| 
 Aug 2005 
 | 
0.002950 | 
0.000343 | 
| 
 Sep 2005 
 | 
0.005550 | 
0.001387 | 
| 
 Oct 2005 
 | 
0.003948 | 
0.000230 | 
| 
 Nov 2005 
 | 
0.001499 | 
-0.001013 | 
| 
 Dec 2005 
 | 
0.001171 | 
-0.001114 | 
| 
 Jan 2006 
 | 
0.001684 | 
-0.001027 | 
| 
 Feb 2006 
 | 
0.001031 | 
-0.001346 | 
| 
 Mar 2006 
 | 
0.001483 | 
-0.000682 | 
| 
 Apr 2006 
 | 
0.001945 | 
-0.000372 | 
| 
 May 2006 
 | 
0.003121 | 
0.000150 | 
| 
 Jun 2006 
 | 
0.003820 | 
0.000940 | 
| 
 Jul 2006 
 | 
0.003867 | 
0.001127 | 
| 
 Aug 2006 
 | 
0.002171 | 
-0.000077 | 
| 
 Sep 2006 
 | 
-0.002954 | 
-0.002738 | 
| 
 Oct 2006 
 | 
-0.003541 | 
-0.002922 | 
| 
 Nov 2006 
 | 
-0.001354 | 
-0.001792 | 
| 
 Dec 2006 
 | 
-0.000635 | 
-0.001654 | 
| 
 Jan 2007 
 | 
-0.001149 | 
-0.001828 | 
| 
 Feb 2007 
 | 
-0.000781 | 
-0.001683 | 
| 
 Mar 2007 
 | 
0.000292 | 
-0.000982 | 
| 
 Apr 2007 
 | 
0.000119 | 
-0.001069 | 
| 
 May 2007 
 | 
0.000451 | 
-0.000986 | 
| 
 Jun 2007 
 | 
-0.000364 | 
-0.001838 | 
| 
 Jul 2007 
 | 
-0.001463 | 
-0.002658 | 
| 
 Aug 2007 
 | 
-0.001581 | 
-0.002240 | 
| 
 Sep 2007 
 | 
0.000427 | 
-0.001212 | 
| 
 Oct 2007 
 | 
0.002049 | 
-0.000078 | 
| 
 Nov 2007 
 | 
0.003422 | 
0.000536 | 
| 
 Dec 2007 
 | 
0.002411 | 
-0.000196 | 
| 
 Jan 2008 
 | 
0.002620 | 
-0.000029 | 
| 
 Feb 2008 
 | 
0.003331 | 
0.000778 | 
| 
 Mar 2008 
 | 
0.003420 | 
0.000988 | 
| 
 Apr 2008 
 | 
0.003266 | 
0.001079 | 
| 
 May 2008 
 | 
0.004208 | 
0.002011 | 
| 
 Jun 2008 
 | 
0.006221 | 
0.003192 | 
| 
 Jul 2008 
 | 
0.006770 | 
0.003576 | 
| 
 Aug 2008 
 | 
0.006422 | 
0.003409 | 
| 
 Sep 2008 
 | 
0.006595 | 
0.003864 | 
| 
 Oct 2008 
 | 
0.006314 | 
0.004423 | 
| 
 Nov 2008 
 | 
0.005688 | 
0.003909 | 
| 
 Dec 2008 
 | 
0.007608 | 
0.004631 | 
| 
 Jan 2009 
 | 
0.007293 | 
0.004594 | 
| 
 Feb 2009 
 | 
0.005492 | 
0.003103 | 
| 
 Mar 2009 
 | 
0.003860 | 
0.001765 | 
| 
 Apr 2009 
 | 
0.002028 | 
0.000338 | 
| 
 May 2009 
 | 
-0.000140 | 
-0.000984 | 
| 
 Jun 2009 
 | 
-0.001784 | 
-0.001657 | 
| 
 Jul 2009 
 | 
-0.001832 | 
-0.001493 | 
| 
 Aug 2009 
 | 
-0.000814 | 
-0.001235 | 
| 
 Sep 2009 
 | 
-0.000859 | 
-0.001641 | 
| 
 Oct 2009 
 | 
-0.001024 | 
-0.002537 | 
| 
 Nov 2009 
 | 
-0.001980 | 
-0.002983 | 
| 
 Dec 2009 
 | 
-0.003037 | 
-0.002914 | 
| 
 Jan 2010 
 | 
-0.002782 | 
-0.002757 | 
| 
 Feb 2010 
 | 
-0.001075 | 
-0.001565 | 
| 
 Mar 2010 
 | 
-0.001116 | 
-0.001413 | 
| 
 Apr 2010 
 | 
-0.000765 | 
-0.001160 | 
| 
 May 2010 
 | 
-0.000740 | 
-0.001326 | 
| 
 Jun 2010 
 | 
-0.000243 | 
-0.001105 | 
| 
 Jul 2010 
 | 
-0.000297 | 
-0.001240 | 
| 
 Aug 2010 
 | 
-0.000384 | 
-0.001293 | 
| 
 Sep 2010 
 | 
-0.000470 | 
-0.001317 | 
| 
 Oct 2010 
 | 
-0.000315 | 
-0.001145 | 
| 
 Nov 2010 
 | 
-0.000553 | 
-0.001317 | 
| 
 Dec 2010 
 | 
-0.000689 | 
-0.001291 | 
| 
 Jan 2011 
 | 
-0.000185 | 
-0.000954 | 
| 
 Feb 2011 
 | 
-0.000517 | 
-0.001112 | 
| 
 Mar 2011 
 | 
0.000433 | 
-0.000489 | 
| 
 Apr 2011 
 | 
0.001582 | 
0.000770 | 
| 
 May 2011 
 | 
0.001572 | 
0.000577 | 
| 
 Jun 2011 
 | 
0.000798 | 
0.000173 | 
| 
 Jul 2011 
 | 
0.000689 | 
0.000244 | 
| 
 Aug 2011 
 | 
0.000433 | 
-0.000034 | 
| 
 Sep 2011 
 | 
0.001083 | 
0.000576 | 
| 
 Oct 2011 
 | 
0.001402 | 
0.000827 | 
| 
 Nov 2011 
 | 
0.001799 | 
0.001189 | 
| 
 Dec 2011 
 | 
0.001694 | 
0.001005 | 
| 
 Jan 2012 
 | 
0.001847 | 
0.001046 | 
| 
 Feb 2012 
 | 
0.002496 | 
0.001412 | 
| 
 Mar 2012 
 | 
0.003244 | 
0.001847 | 
| 
 Apr 2012 
 | 
0.002639 | 
0.000995 | 
| 
 May 2012 
 | 
0.002493 | 
0.001265 | 
| 
 Jun 2012 
 | 
0.001996 | 
0.000973 | 
| 
 Jul 2012 
 | 
0.001464 | 
0.000557 | 
| 
 Aug 2012 
 | 
0.001991 | 
0.000770 | 
| 
 Sep 2012 
 | 
0.001728 | 
0.000271 | 
| 
 Oct 2012 
 | 
0.001150 | 
-0.000243 | 
| 
 Nov 2012 
 | 
-0.000067 | 
-0.000952 | 
| 
 Dec 2012 
 | 
-0.000971 | 
-0.001661 |