Year	Index (Units)
1980	45.867
1981	51.533
1982	56.500
1983	59.133
1984	61.300
1985	63.833
1986	66.633
1987	69.433
1988	72.271
1989	76.031
1990	79.769
1991	83.049
1992	84.533
1993	86.067
1994	86.100
1995	87.867
1996	89.667
1997	90.567
1998	91.600
1999	93.767
2000	96.700
2001	97.733
2002	101.467
2003	103.200
2004	105.567
2005	108.000
2006	109.500
2007	112.233
2008	114.300
2009	115.200
2010	117.767
2011	120.900
2012	122.100
2013	123.267
2014	125.700
2015	127.300
2016	129.100
2017	131.467
2018	134.167
2019	136.933
2020	138.000
2021	144.533
2022	154.133
2023	159.033
2024	162.295
2025	165.348
2026	168.486
2027	171.603
2028	174.958
2029	178.481