Year	current US$
2006	171580000
2007	177947228.143312
2008	190915102.148093
2009	212564001.156237
2010	238623065.815222
2011	215424493.832844
2012	217148645.741621
2013	218784177.190285
2014	224147086.878863
2015	186973109.772682
2016	213856867.829307
2017	218383822.031545
2018	197545233.446783
2019	198609831.920464
2020	183196006.11852
2021	159405524.463641