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

Source: U.S. Bureau of Labor Statistics.