Year	% (cumulative)
1981	24.6924800872803
2005	52.0495109558105
2006	54.4631881713867
2007	55.1623191833496
2008	55.6789512634277
2010	56.032169342041
2014	57.537281036377
2015	59.0127792358398
2016	57.0322494506836
2017	61.6141166687012
2018	62.6769981384277
2019	66.9383544921875
2020	68.4998321533203
2021	69.681266784668
2022	70.7434005737305