Chart A-1. Percentage-point difference between Laspeyres and geometric Young headline indexes, 12-month import inflation, 2013–22
Month Difference

January 2013

0.474

February 2013

0.415

March 2013

0.432

April 2013

0.441

May 2013

0.469

June 2013

0.467

July 2013

0.463

August 2013

0.462

September 2013

0.471

October 2013

0.465

November 2013

0.454

December 2013

0.446

January 2014

0.423

February 2014

0.422

March 2014

0.397

April 2014

0.378

May 2014

0.349

June 2014

0.357

July 2014

0.358

August 2014

0.357

September 2014

0.341

October 2014

0.348

November 2014

0.332

December 2014

0.343

January 2015

0.362

February 2015

0.346

March 2015

0.343

April 2015

0.313

May 2015

0.316

June 2015

0.300

July 2015

0.291

August 2015

0.280

September 2015

0.273

October 2015

0.294

November 2015

0.309

December 2015

0.302

January 2016

0.406

February 2016

0.448

March 2016

0.466

April 2016

0.470

May 2016

0.467

June 2016

0.483

July 2016

0.491

August 2016

0.496

September 2016

0.507

October 2016

0.486

November 2016

0.480

December 2016

0.478

January 2017

0.464

February 2017

0.493

March 2017

0.518

April 2017

0.657

May 2017

0.659

June 2017

0.651

July 2017

0.642

August 2017

0.646

September 2017

0.640

October 2017

0.733

November 2017

0.737

December 2017

0.728

January 2018

0.610

February 2018

0.599

March 2018

0.559

April 2018

0.424

May 2018

0.416

June 2018

0.412

July 2018

0.419

August 2018

0.398

September 2018

0.401

October 2018

0.270

November 2018

0.260

December 2018

0.248

January 2019

0.230

February 2019

0.158

March 2019

0.149

April 2019

0.140

May 2019

0.139

June 2019

0.144

July 2019

0.125

August 2019

0.140

September 2019

0.137

October 2019

0.144

November 2019

0.144

December 2019

0.157

January 2020

0.163

February 2020

0.178

March 2020

0.187

April 2020

0.191

May 2020

0.183

June 2020

0.165

July 2020

0.176

August 2020

0.166

September 2020

0.162

October 2020

0.172

November 2020

0.172

December 2020

0.177

January 2021

0.157

February 2021

0.159

March 2021

0.157

April 2021

0.186

May 2021

0.225

June 2021

0.254

July 2021

0.288

August 2021

0.295

September 2021

0.301

October 2021

0.323

November 2021

0.326

December 2021

0.327

January 2022

0.443

February 2022

0.436

March 2022

0.412

April 2022

0.428

May 2022

0.399

June 2022

0.385

July 2022

0.450

August 2022

0.389

September 2022

0.375

October 2022

0.322

November 2022

0.331

December 2022

0.312

Note: This chart shows the difference between a Laspeyres formula and a geometric Young formula in the calculation of a 12-month change of headline inflation for imports through the classification-group level.

Source: U.S. Bureau of Labor Statistics.