Year	Index (Units)
1980	35.467
1981	39.051
1982	47.211
1983	51.254
1984	57.312
1985	57.462
1986	57.990
1987	57.208
1988	56.873
1989	57.328
1990	59.784
1991	58.424
1992	57.255
1993	59.029
1994	83.832
1995	95.802
1996	93.864
1997	95.938
1998	98.304
1999	100.000
2000	99.380
2001	104.030
2002	107.684
2003	99.506
2004	103.087
2005	110.820
2006	115.970
2007	121.253
2008	130.516
2009	136.650
2010	142.085
2011	159.353
2012	166.691
2013	167.779
2014	169.912
2015	174.807
2016	177.169
2017	180.592
2018	183.228
2019	186.750
2020	189.394
2021	198.751
2022	204.134
2023	210.258
2024	212.360
2025	216.608
2026	220.940
2027	225.359
2028	229.866
2029	234.463