Year	% (cumulative)
1975	25.8722896575928
1992	82.7248764038086
2001	96.9907836914062
2006	98.1634140014648
2007	98.4000473022461
2008	98.4728775024414
2009	98.7476119995117
2010	98.8114624023438
2011	98.858757019043
2012	98.9947280883789
2013	98.9258651733398
2014	98.8406295776367
2015	98.9399795532227
2016	98.9956665039062
2017	99.120231628418
2018	99.0381317138672
2019	99.1240386962891
2020	99.213996887207
2021	99.1460189819336
2022	99.1713409423828