Year	% (cumulative)
1971	4.64019012451172
1981	7.86207008361816
1991	13.5577697753906
2006	41.6072006225586
2007	43.1394996643066
2008	40.5012245178223
2009	43.3172264099121
2010	44.2548294067383
2011	37.7941513061523
2012	48.1029586791992
2013	49.5278053283691
2014	51.4912147521973
2015	51.7352561950684
2016	52.468318939209
2017	42.9487991333008
2018	54.5925102233887
2019	54.9528846740723
2020	57.1144752502441
2021	59.60009765625
2022	60.1431846618652