Year	Index (Units)
1980	0.836
1981	1.022
1982	1.232
1983	1.421
1984	1.778
1985	2.045
1986	2.207
1987	2.840
1988	3.973
1989	7.529
1990	12.370
1991	25.124
1992	31.832
1993	34.506
1994	38.784
1995	43.524
1996	46.611
1997	48.269
1998	50.474
1999	54.276
2000	57.593
2001	59.118
2002	62.287
2003	66.011
2004	69.094
2005	73.878
2006	78.811
2007	88.426
2008	95.590
2009	98.413
2010	102.646
2011	107.170
2012	109.733
2013	111.828
2014	112.593
2015	111.618
2016	112.542
2017	114.729
2018	116.189
2019	118.619
2020	120.081
2021	124.069
2022	132.105
2023	138.098
2024	141.956
2025	148.433
2026	156.604
2027	165.193
2028	174.304
2029	184.155