Year	Index (Units)
1987	1.003
1988	1.314
1989	2.483
1990	6.233
1991	15.582
1992	33.034
1993	46.578
1994	60.505
1995	59.380
1996	65.338
1997	76.243
1998	82.329
1999	82.478
2000	82.760
2001	82.324
2002	83.499
2003	83.464
2004	87.858
2005	95.248
2006	99.249
2007	113.096
2008	127.256
2009	134.032
2010	138.245
2011	145.030
2012	148.715
2013	155.668
2014	157.287
2015	161.766
2016	168.034
2017	171.782
2018	174.586
2019	179.950
2020	185.125
2021	191.979
2022	197.500
2023	202.840
2024	208.798
2025	215.144
2026	221.684
2027	228.334
2028	235.184
2029	242.240