Year	current US$
2000	275.642691037403
2001	268.5420714708875
2002	230.18421873608685
2003	240.93112472758668
2004	273.02053892300813
2005	331.17027883574667
2006	386.5976733110747
2007	462.53378635028184
2008	531.5288492055587
2009	526.1203197300233
2010	625.231593303502
2011	711.2260388087528
2012	706.2234081312455
2013	735.5424316569197
2014	741.0825300785943
2015	655.8836080256448
2016	623.9496591529285
2017	704.7540023679311
2018	664.2132464674494
2019	648.726308801227
2020	584.645260425361
2021	637.7783428793242