Year	Index (Units)
1980	39.663
1981	40.484
1982	40.562
1983	39.226
1984	37.229
1985	37.486
1986	36.798
1987	38.370
1988	40.050
1989	39.945
1990	41.663
1991	39.664
1992	40.524
1993	40.567
1994	41.557
1995	43.073
1996	46.937
1997	45.794
1998	44.316
1999	47.848
2000	51.969
2001	51.413
2002	53.352
2003	55.525
2004	60.240
2005	70.201
2006	78.599
2007	88.439
2008	104.840
2009	88.925
2010	100.000
2011	113.167
2012	118.463
2013	117.339
2014	116.555
2015	97.595
2016	92.198
2017	96.795
2018	104.478
2019	101.140
2020	88.972
2021	101.289
2022	114.701
2023	110.293
2024	111.540
2025	111.627
2026	112.412
2027	113.625
2028	115.175
2029	116.966