Year	Index (Units)
1980	36.130
1981	42.918
1982	46.271
1983	49.092
1984	51.870
1985	53.168
1986	53.464
1987	52.997
1988	55.117
1989	58.200
1990	59.786
1991	61.367
1992	63.685
1993	65.474
1994	69.687
1995	71.797
1996	73.256
1997	74.168
1998	75.210
1999	75.642
2000	77.262
2001	78.553
2002	79.392
2003	81.103
2004	82.978
2005	85.863
2006	89.513
2007	92.968
2008	100.436
2009	100.126
2010	103.567
2011	106.708
2012	109.281
2013	109.233
2014	108.158
2015	107.526
2016	109.371
2017	110.368
2018	111.257
2019	111.923
2020	111.093
2021	112.449
2022	115.353
2023	118.855
2024	120.887
2025	123.327
2026	125.822
2027	128.368
2028	130.966
2029	133.616
