Year	% (cumulative)
1981	1.10973000526428
2001	13.362099647522
2011	18.4202308654785
2012	19.0687808990479
2013	16.9880695343018
2014	18.9077491760254
2015	23.7227306365967
2016	23.8859195709229
2017	24.9762001037598
2018	25.9920597076416
2019	26.8390102386475
2021	29.3662109375