Chart 3b. All-payer indexes for outpatient hospital services, January 2016–March 2020
Date	Comparison unchained Lowe	Consumer Price Index	Medical claims unchained Lowe	Medical claims mixed quantity	Medical claims chained Törnqvist
Jan 2016	100.00	100.00	100.00	100.00	100.00
Feb 2016	101.03	100.39	100.88	100.79	100.75
Mar 2016	100.69	100.18	100.95	101.14	100.88
Apr 2016	99.55	100.24	100.58	100.83	100.43
May 2016	100.11	100.52	100.25	100.58	100.26
Jun 2016	100.18	100.46	101.02	101.50	100.80
Jul 2016	100.73	100.81	101.58	101.90	101.50
Aug 2016	101.95	102.19	101.69	102.06	101.93
Sep 2016	102.49	102.48	101.84	102.16	101.93
Oct 2016	103.54	102.67	103.81	104.17	103.70
Nov 2016	103.89	102.61	103.90	104.52	104.01
Dec 2016	104.54	102.60	103.77	104.63	103.57
Jan 2017	104.08	103.36	103.16	104.17	103.26
Feb 2017	104.27	104.73	104.28	104.85	104.13
Mar 2017	104.16	104.95	104.38	105.55	104.30
Apr 2017	104.87	106.23	105.09	106.49	105.04
May 2017	104.07	106.11	104.69	105.79	104.82
Jun 2017	104.13	106.61	105.84	106.50	105.87
Jul 2017	103.94	106.96	105.71	105.96	105.48
Aug 2017	105.27	106.83	106.16	106.39	105.78
Sep 2017	103.91	107.15	106.97	107.71	106.70
Oct 2017	104.45	107.62	107.08	107.42	106.59
Nov 2017	104.60	107.46	107.42	107.61	106.80
Dec 2017	104.57	107.56	107.54	107.68	106.74
Jan 2018	107.81	109.60	107.75	108.31	107.08
Feb 2018	108.15	109.83	108.43	108.85	107.74
Mar 2018	109.08	110.34	109.21	109.56	108.59
Apr 2018	109.16	110.51	108.94	109.14	108.38
May 2018	109.27	110.62	108.71	108.80	108.14
Jun 2018	110.13	111.21	109.96	110.15	109.34
Jul 2018	110.49	111.56	110.27	110.34	109.70
Aug 2018	111.08	110.92	111.37	111.44	110.88
Sep 2018	110.98	110.60	112.10	112.43	111.47
Oct 2018	112.11	110.81	112.48	112.95	112.05
Nov 2018	112.40	111.63	112.63	113.15	112.04
Dec 2018	112.36	111.89	113.01	113.63	112.39
Jan 2019	113.22	112.27	113.95	116.68	114.28
Feb 2019	114.12	112.16	114.11	116.71	114.11
Mar 2019	113.31	112.24	113.33	115.57	113.58
Apr 2019	113.28	111.56	113.66	115.46	113.73
May 2019	112.64	111.58	113.63	115.01	113.69
Jun 2019	113.75	111.28	114.15	114.62	114.20
Jul 2019	114.15	111.97	114.50	114.96	114.37
Aug 2019	114.82	113.21	114.99	115.02	114.93
Sep 2019	114.99	112.99	115.10	116.16	114.99
Oct 2019	115.53	114.08	114.95	116.48	114.66
Nov 2019	115.61	114.10	115.92	118.52	115.68
Dec 2019	115.19	114.12	115.59	119.08	115.34
Jan 2020	115.14	115.79	116.16	120.29	116.37
Feb 2020	116.27	116.12	116.70	119.27	116.51
Mar 2020	116.93	116.28	117.84	120.30	117.62
Source: U.S. Bureau of Labor Statistics.