Year	% (cumulative)
1971	1.0867999792099
1981	1.56772994995117
1991	4.81644010543823
2005	20.8884105682373
2007	20.6135406494141
2008	19.6564807891846
2009	22.9041690826416
2010	23.7724494934082
2011	23.7450504302979
2012	24.3271408081055
2013	25.5295791625977
2014	26.0173606872559
2015	27.1723709106445
2016	28.2476100921631
2017	29.1843795776367
2018	29.5080871582031
2019	30.820140838623
2020	31.1826763153076
2021	32.3056716918945