Year	Index (Units)
1980	6.950
1981	7.131
1982	7.432
1983	7.661
1984	7.409
1985	9.795
1986	9.276
1987	8.707
1988	8.971
1989	9.481
1990	9.803
1991	11.684
1992	13.534
1993	15.315
1994	15.718
1995	17.717
1996	17.586
1997	17.714
1998	17.779
1999	17.972
2000	18.367
2001	17.465
2002	16.817
2003	18.951
2004	20.044
2005	21.861
2006	24.230
2007	28.310
2008	36.746
2009	45.088
2010	46.603
2011	55.832
2012	74.523
2013	78.661
2014	87.267
2015	96.716
2016	108.190
2017	114.737
2018	127.883
2019	143.438
2020	169.606
2021	205.348
2022	273.842
2023	361.933
2024	463.876
2025	561.417
2026	652.583
2027	744.401
2028	843.442
2029	947.053