Year | Value | 2021 | 82.383611294945 | 2020 | 83.887494535694 | 2019 | 75.698488249498 | 2018 | 64.570381421861 | 2017 | 75.888727816919 | 2016 | 80.735581967553 | 2015 | 79.864418147579 | 2014 | 73.320227477147 | 2013 | 70.580769792001 | 2012 | 63.669152640547 | 2011 | 69.63767391652 | 1998 | 55.565703862304 | 1997 | 53.107824968913 | 1996 | 37.481064963109 | 1995 | 35.756903909283 |
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