Figure 4. One-month change based on final Chained Consumer Price Index for All Urban Consumers (C-CPI-U) less preliminary C-CPI-U, excludes revision chaining, 2000–12
Index period Geometric Young Constant elasticity of substitution

Jan 2000

0.000808 0.000464

Feb 2000

0.000253 0.000030

Mar 2000

-0.000281 -0.000463

Apr 2000

-0.000498 -0.000535

May 2000

-0.000354 -0.000430

Jun 2000

-0.000092 -0.000621

Jul 2000

0.000470 0.000205

Aug 2000

-0.000173 -0.000223

Sep 2000

-0.000303 -0.000363

Oct 2000

-0.000576 -0.000583

Nov 2000

-0.000601 -0.000982

Dec 2000

-0.000975 -0.001135

Jan 2001

0.001809 0.001113

Feb 2001

-0.000610 -0.000689

Mar 2001

-0.000502 -0.000397

Apr 2001

-0.000170 -0.000443

May 2001

0.000145 -0.000275

Jun 2001

0.000601 0.000482

Jul 2001

0.000463 0.000259

Aug 2001

0.000855 0.000721

Sep 2001

-0.000410 -0.000599

Oct 2001

0.000084 0.000264

Nov 2001

-0.000072 -0.000464

Dec 2001

-0.000153 -0.000500

Jan 2002

0.000485 0.000377

Feb 2002

-0.000244 -0.000419

Mar 2002

-0.000318 -0.000171

Apr 2002

-0.000401 -0.000366

May 2002

-0.000321 -0.000342

Jun 2002

-0.000309 -0.000534

Jul 2002

0.000986 0.000751

Aug 2002

0.000011 -0.000115

Sep 2002

0.000422 0.000361

Oct 2002

-0.000329 -0.000396

Nov 2002

-0.000152 -0.000400

Dec 2002

0.000252 -0.000022

Jan 2003

0.000572 0.000330

Feb 2003

-0.000087 -0.000370

Mar 2003

0.000700 0.000563

Apr 2003

-0.000314 -0.000178

May 2003

0.000136 0.000033

Jun 2003

0.000172 -0.000054

Jul 2003

0.000678 0.000395

Aug 2003

0.001020 0.000712

Sep 2003

0.000247 0.000080

Oct 2003

-0.000573 -0.000490

Nov 2003

0.000058 -0.000246

Dec 2003

0.000306 0.000040

Jan 2004

0.001112 0.000980

Feb 2004

0.000348 0.000255

Mar 2004

-0.000330 -0.000417

Apr 2004

0.000257 0.000029

May 2004

0.000520 0.000083

Jun 2004

-0.000630 -0.000888

Jul 2004

0.000029 0.000016

Aug 2004

0.000394 0.000312

Sep 2004

0.000562 0.000675

Oct 2004

0.000331 0.000030

Nov 2004

-0.000167 -0.000288

Dec 2004

-0.000210 -0.000184

Jan 2005

-0.000190 -0.000183

Feb 2005

-0.000203 -0.000387

Mar 2005

-0.000608 -0.000903

Apr 2005

0.001099 0.000592

May 2005

-0.000321 -0.000182

Jun 2005

-0.000227 -0.000465

Jul 2005

0.001130 0.000454

Aug 2005

0.001684 0.001179

Sep 2005

0.003073 0.001691

Oct 2005

-0.001205 -0.001083

Nov 2005

-0.002508 -0.001483

Dec 2005

-0.000527 -0.000282

Jan 2006

0.000303 -0.000094

Feb 2006

-0.000833 -0.000699

Mar 2006

-0.000165 -0.000256

Apr 2006

0.001550 0.000897

May 2006

0.000810 0.000323

Jun 2006

0.000440 0.000296

Jul 2006

0.001179 0.000635

Aug 2006

0.000045 0.000013

Sep 2006

-0.001943 -0.000931

Oct 2006

-0.001793 -0.001275

Nov 2006

-0.000360 -0.000369

Dec 2006

0.000180 -0.000139

Jan 2007

-0.000206 -0.000272

Feb 2007

-0.000470 -0.000553

Mar 2007

0.000892 0.000437

Apr 2007

0.001377 0.000809

May 2007

0.001136 0.000406

Jun 2007

-0.000357 -0.000539

Jul 2007

0.000098 -0.000175

Aug 2007

-0.000076 0.000415

Sep 2007

0.000022 0.000084

Oct 2007

-0.000232 -0.000175

Nov 2007

0.000954 0.000224

Dec 2007

-0.000789 -0.000843

Jan 2008

-0.000007 -0.000111

Feb 2008

0.000224 0.000229

Mar 2008

0.000978 0.000641

Apr 2008

0.001228 0.000897

May 2008

0.002044 0.001308

Jun 2008

0.001553 0.000581

Jul 2008

0.000593 0.000175

Aug 2008

-0.000396 0.000262

Sep 2008

0.000208 0.000530

Oct 2008

-0.000434 0.000401

Nov 2008

0.000472 -0.000177

Dec 2008

0.001184 -0.000079

Jan 2009

-0.000324 -0.000147

Feb 2009

-0.001598 -0.001274

Mar 2009

-0.000639 -0.000690

Apr 2009

-0.000617 -0.000543

May 2009

-0.000161 -0.000040

Jun 2009

-0.000128 -0.000108

Jul 2009

0.000529 0.000330

Aug 2009

0.000647 0.000533

Sep 2009

0.000163 0.000121

Oct 2009

-0.000595 -0.000480

Nov 2009

-0.000440 -0.000570

Dec 2009

0.000189 0.000018

Jan 2010

-0.000077 0.000005

Feb 2010

0.000069 -0.000112

Mar 2010

-0.000678 -0.000539

Apr 2010

-0.000274 -0.000296

May 2010

-0.000138 -0.000205

Jun 2010

0.000358 0.000099

Jul 2010

0.000477 0.000199

Aug 2010

0.000560 0.000480

Sep 2010

0.000078 0.000097

Oct 2010

-0.000442 -0.000309

Nov 2010

-0.000676 -0.000741

Dec 2010

0.000058 0.000048

Jan 2011

0.000422 0.000340

Feb 2011

-0.000256 -0.000264

Mar 2011

0.000257 0.000078

Apr 2011

0.000846 0.000934

May 2011

-0.000153 -0.000397

Jun 2011

-0.000390 -0.000292

Jul 2011

0.000371 0.000267

Aug 2011

0.000312 0.000212

Sep 2011

0.000705 0.000686

Oct 2011

-0.000129 -0.000064

Nov 2011

-0.000289 -0.000389

Dec 2011

-0.000037 -0.000127

Jan 2012

0.000572 0.000381

Feb 2012

0.000381 0.000094

Mar 2012

0.000998 0.000509

Apr 2012

0.000260 0.000101

May 2012

-0.000284 -0.000125

Jun 2012

-0.000878 -0.000578

Jul 2012

-0.000150 -0.000140

Aug 2012

0.000832 0.000422

Sep 2012

0.000443 0.000193

Oct 2012

-0.000700 -0.000569

Nov 2012

-0.001477 -0.001082

Dec 2012

-0.000925 -0.000823

Source: U.S. Bureau of Labor Statistics.