Year	current international $
2000	7.47582157686225
2001	8.36518628907784
2002	9.05899580490819
2003	8.39553443365317
2004	8.48235148550584
2005	8.123128511642
2006	12.1283223567644
2007	14.4411069260797
2008	14.1056882147527
2009	17.5988667174503
2010	23.3531116573969
2011	23.1695917935835
2012	22.8069230369952
2013	21.7919535711017
2014	23.1023923180951
2015	22.9099893421307
2016	23.582571099254
2017	23.6173631704501
2018	24.820927578464
2019	27.8858803747268
2020	27.363075502474
2021	30.2409377499231