Year	Index (Units)
1980	6.083
1981	6.793
1982	7.705
1983	8.842
1984	9.708
1985	12.812
1986	16.699
1987	19.972
1988	23.616
1989	29.162
1990	34.800
1991	38.220
1992	45.840
1993	51.380
1994	55.950
1995	62.320
1996	66.900
1997	68.190
1998	71.070
1999	70.340
2000	73.360
2001	74.400
2002	76.480
2003	78.410
2004	82.620
2005	86.140
2006	90.340
2007	94.730
2008	99.920
2009	100.000
2010	102.130
2011	107.290
2012	108.130
2013	108.980
2014	109.500
2015	110.610
2016	109.580
2017	111.810
2018	112.300
2019	112.290
2020	112.200
2021	119.060
2022	127.770
2023	129.340
2024	131.539
2025	133.775
2026	136.183
2027	138.634
2028	141.130
2029	143.670