Year	Index (Units)
1980	22.713
1981	26.480
1982	28.190
1983	29.549
1984	30.855
1985	32.085
1986	33.679
1987	35.306
1988	37.821
1989	40.115
1990	44.161
1991	48.198
1992	51.947
1993	55.196
1994	59.699
1995	63.893
1996	66.519
1997	69.182
1998	72.279
1999	71.390
2000	72.119
2001	74.628
2002	76.892
2003	79.544
2004	82.032
2005	82.887
2006	82.702
2007	84.702
2008	87.096
2009	90.239
2010	92.710
2011	93.898
2012	95.073
2013	96.042
2014	96.913
2015	100.000
2016	101.986
2017	104.253
2018	104.756
2019	103.877
2020	105.502
2021	108.417
2022	109.799
2023	112.066
2024	114.695
2025	117.245
2026	119.744
2027	122.179
2028	124.634
2029	127.088