Year	constant 2011 international $
1990	30975.9824076612
1991	30412.9892293762
1992	29884.8280327257
1993	29098.0177507587
1994	30072.9774255742
1995	31118.2273186916
1996	31540.6879384815
1997	32440.667938393
1998	33797.6954291974
1999	35286.5888056617
2000	36901.8521359489
2001	37381.9883438097
2002	38033.7989610785
2003	38786.720092202
2004	40299.9202524851
2005	41269.6534779254
2006	42966.7826018108
2007	44102.8713029557
2008	43516.8579354598
2009	40905.7995784945
2010	42988.8052058718
2011	43808.5011571571
2012	43355.8077615201
2013	43522.3512150498
2014	44213.8779689315
2015	45698.4950627754
2016	46339.1244222001
2017	46681.1714804268
2018	47193.5783414999