Year Curve
2007 -0.94
2008 -1.04
2009 -1.29
2010 -1.24
2012 -1.18
2013 -1.22
2014 -1.19
2015 -1.12
2016 -1.26
2017 -1.24
2018 -1.50
2019 -1.50
2020 -1.35