Year	% (cumulative)
1970	65.0999984741211
1978	81.5
1988	91.1470718383789
2002	95.9961929321289
2006	97.746711730957
2007	97.9982604980469
2008	98.0334014892578
2009	98.1783218383789
2010	97.8860092163086
2011	98.0129089355469
2012	98.1982803344727
2013	98.3483276367188
2014	98.3930587768555
2015	97.7057189941406
2016	98.9018936157227
2017	97.9406356811523
2018	98.1060333251953
2019	98.265251159668
2020	99.1092300415039
2021	97.8612670898438
2022	97.9530715942383