Year	Index (Units)
1980	1.813
1981	2.701
1982	4.149
1983	7.326
1984	9.295
1985	12.262
1986	15.241
1987	18.306
1988	22.514
1989	27.627
1990	31.838
1991	34.508
1992	35.618
1993	36.185
1994	37.107
1995	38.199
1996	39.146
1997	40.224
1998	42.120
1999	43.599
2000	45.353
2001	49.301
2002	52.196
2003	52.452
2004	53.856
2005	55.507
2006	60.290
2007	62.902
2008	70.535
2009	78.156
2010	83.134
2011	85.709
2012	88.658
2013	90.541
2014	94.291
2015	100.000
2016	102.261
2017	103.219
2018	105.935
2019	110.657
2020	115.101
2021	122.427
2022	133.266
2023	141.130
2024	147.657
2025	152.415
2026	157.426
2027	162.774
2028	168.095
2029	173.571