Year Fourseam
2010 7.88
2011 6.80
2012 7.88
2013 9.12
2014 11.55
2015 15.23
2016 11.05
2017 15.21
2018 15.50
2019 13.87
2021 12.81
2022 5.41
2023 12.32
2024 10.97