Year constant 2021 international $ 2007 10926.440059799612 2008 11747.385077484278 2009 11653.811709265503 2010 11861.117769893828 2011 12162.662666772427 2012 13338.987270594354 2013 13563.73569423406 2014 13108.09599097221 2015 13340.266514195835 2016 14823.34735313593 2017 14222.171990724635 2018 14235.915159557353 2019 14705.624819888804 2020 12595.00346460386 2021 12472.526730448266