Year	% (cumulative)
1980	31.5832901000977
1990	45.0984687805176
1997	53.9911308288574
2000	53.4799995422363
2001	49.8400001525879
2002	52.1800003051758
2003	53.060001373291
2004	53.6599998474121
2005	54.0400009155273
2006	54.3899993896484
2007	56.0400009155273
2008	57.3199996948242
2009	57.5699996948242
2010	62.8888282775879
2011	59.3300018310547
2013	61.2700004577637
2014	62.25
2015	63.3800010681152
2016	63.5999984741211
2017	63.9199981689453
2018	64.0400009155273
2019	65.6900024414062
2021	67.5699996948242
2022	67.1500015258789
2023	67.7313461303711