Year % 2010 3.14128983598116 2011 3.17151109207084 2012 3.52577006791977 2015 3.27824443112999 2016 2.65748344310486 2017 1.74230597655898 2018 1.76025735351403 2019 1.36888337331626 2020 1.40572759059853 2021 1.24098689385217 2022 1.06844331585725