Year	% (cumulative)
1972	4.92035007476807
1981	2.89246988296509
2005	5.8188099861145
2006	8.85766983032227
2007	7.45702934265137
2008	8.29203033447266
2009	8.658860206604
2010	9.00115966796875
2011	10.0231599807739
2012	10.056679725647
2013	10.6469097137451
2014	11.3053598403931
2015	10.0962390899658
2016	15.8535718917847
2017	11.2352304458618
2018	3.68220996856689
2019	4.52012014389038
2021	10.1768083572388