Year	Index
1980	4
1981	4.434
1982	4.761
1983	5.248
1984	5.584
1985	6.179
1986	6.382
1987	5.651
1988	5.883
1989	6.29
1990	7.629
1991	8.805
1992	10.509
1993	12.88
1994	18.361
1995	23.906
1996	28.828
1997	33.491
1998	37.752
1999	40.819
2000	45.497
2001	53
2002	57.953
2003	73.446
2004	94.244
2005	110.041
2006	125.678
2007	136.937
2008	156.629
2009	162
2010	168.7
2011	181.158
2012	193.442
2013	206.55
2014	214.696
2015	230.85
2016	261.733
2017	300.308
2018	340.783
2019	391.71
2020	442.447
2021	496.552
2022	553.399
2023	612.749
2024	675.401