Year Sinker
2007 90.10
2008 91.18
2009 92.76
2010 92.69
2011 92.51
2012 92.54
2013 92.29
2014 91.56
2015 91.35
2016 91.58
2017 90.74
2018 90.74
2019 89.51
2020 88.79
2021 87.58