Year % 2008 1.77774462673172 2009 2.02365300059617 2010 1.91657120024141 2011 2.08309528155411 2012 2.15851766654297 2013 1.79854386150578 2014 2.09047784392733 2015 3.0812991544216 2016 2.49975083446666 2017 2.76818100498897 2018 3.73018824140234 2019 3.78623688418196 2020 5.32612574594665 2021 6.15624522091609 2022 4.78350416832427