Year	Index (Units)
1996	48.775
1997	52.493
1998	55.423
1999	58.495
2000	60.131
2001	60.867
2002	64.338
2003	67.172
2004	69.192
2005	72.857
2006	75.658
2007	77.064
2008	84.687
2009	87.018
2010	90.282
2011	92.878
2012	95.461
2013	97.106
2014	98.788
2015	100.202
2016	99.982
2017	100.195
2018	99.999
2019	101.556
2020	100.833
2021	102.082
2022	105.900
2023	112.118