Year	% (cumulative)
1971	33.2241516113281
2001	68.0583877563477
2002	69.240966796875
2003	68.6636505126953
2004	69.7322463989258
2005	69.8715667724609
2006	70.9326705932617
2007	72.2538223266602
2008	73.0506820678711
2009	73.4931106567383
2010	74.991081237793
2011	75.5101013183594
2012	77.9878311157227
2013	73.9877014160156
2014	76.2753067016602
2015	77.7649536132812
2016	78.3060302734375
2017	79.0385437011719
2018	79.8077621459961
2019	80.3407821655273
2020	81.0055084228516
2021	82.5385818481445
2022	82.6649322509766