Year	Index (Units)
1980	1.003
1981	1.055
1982	1.175
1983	1.391
1984	1.793
1985	2.205
1986	2.385
1987	2.498
1988	3.100
1989	3.558
1990	5.413
1991	8.289
1992	15.485
1993	20.656
1994	26.951
1995	33.682
1996	39.899
1997	43.955
1998	48.051
1999	51.408
2000	56.908
2001	61.390
2002	67.846
2003	75.733
2004	85.470
2005	95.273
2006	103.703
2007	115.429
2008	131.074
2009	144.937
2010	159.120
2011	168.849
2012	179.741
2013	195.439
2014	209.223
2015	223.263
2016	233.393
2017	249.465
2018	262.082
2019	270.214
2020	279.575
2021	300.336
2022	338.772
2023	369.939
2024	390.008
2025	408.584
2026	428.044
2027	448.431
2028	469.788
2029	492.164