Year	% (cumulative)
1970	94.2242813110352
2006	91.3976135253906
2007	90.8289031982422
2008	91.7385711669922
2009	92.1010284423828
2010	91.4206466674805
2011	91.8553237915039
2012	91.1740036010742
2013	91.9264602661133
2014	92.9041213989258
2015	94.274658203125
2016	95.0032577514648
2017	95.3366317749023
2018	95.9446258544922
2019	96.3382873535156
2020	96.5673522949219
2021	96.453498840332
2022	96.2443695068359