Year	current US$
1987	1094736842.1052632
1988	768750000
1989	0
1990	-142439225.38112897
1991	-42977777.77777778
1992	-115804664.72303207
1993	1231550089.6746094
1994	1061734531.5730872
1995	1754747595.8888707
1996	2012514970.0598803
1997	1825382641.509434
1998	2158411854.360711
1999	2293003851.0911427
2000	1722811615.030221
2001	1352114632.2831547
2002	1219718346.4884336
2003	1384788024.7904956
2004	1692405808.477237
2005	1518590400.2012687
2006	1754503987.1361532
2007	2262877132.997752
2008	2922808613.8914165
2009	3250637955.268078
2010	5966357743.537419
2011	6778193883.870025
2012	7576079936.92254
2013	7603097566.458439
2014	7953620434.28686
2015	7845392180.307559
2016	7564770029.801759
2017	6803445167.628339
2018	5647834065.438056
2019	5122073162.899979
2020	4412209045.132424
2021	4900606089.418185
2022	5409717493.942317
2023	4954983042.273129