2022 8.65% 2021 33.78% 2020 38.1% 2019 38.94% 2018 56.94% 2017 77.65% 2016 82.68% Share this:Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window)Click to share on Tumblr (Opens in new window)Click to email a link to a friend (Opens in new window)Click to share on Pinterest (Opens in new window)Like this:Like Loading...