Year	constant 2011 international $
1990	2550.34890395624
1991	2558.10570686496
1992	2549.08109534712
1993	2494.68147689001
1994	2647.9235395106
1995	2610.62907107573
1996	2615.97255313489
1997	2694.30941192253
1998	2761.79570209549
1999	2720.93029031426
2000	2824.30590107529
2001	2664.59993829838
2002	2467.1128958963
2003	2507.86983728001
2004	2541.77907949756
2005	2610.63713730643
2006	2764.42391541911
2007	2839.85332356801
2008	2952.59486854292
2009	2976.97290733276
2010	2949.08129984367
2011	2905.90472228551
2012	2875.76184791295
2013	2850.85168669923
2014	2837.12265918211
2015	2739.22093230476
2016	2775.11097206131
2017	2827.08045309529
2018	2846.07370455262