Year	Index (Units)
1980	49.418
1981	53.026
1982	55.280
1983	56.442
1984	57.335
1985	57.924
1986	57.885
1987	58.462
1988	58.672
1989	58.740
1990	59.192
1991	60.108
1992	61.160
1993	61.453
1994	62.271
1995	62.856
1996	63.650
1997	64.449
1998	64.854
1999	65.697
2000	66.647
2001	66.856
2002	67.524
2003	67.563
2004	67.884
2005	69.825
2006	71.542
2007	74.524
2008	81.051
2009	83.004
2010	85.902
2011	90.949
2012	96.131
2013	100.003
2014	102.626
2015	102.767
2016	103.527
2017	104.433
2018	105.229
2019	104.855
2020	103.229
2021	104.913
2022	107.913
2023	109.517
2024	111.417
2025	113.601
2026	115.873
2027	118.191
2028	120.554
2029	122.965