Year	current US$
1995	4883941279.461207
1996	4886777796.244674
1997	5555520350.320497
1998	5367229677.486922
1999	6055152486.987983
2000	5949796156.49321
2001	6282208886.29726
2002	11129680666.741045
2003	11542314741.825754
2004	12265445744.696978
2005	12068423187.704868
2006	13530432756.381584
2007	17419441235.36089
2008	20276396617.396202
2009	21431646129.274128
2010	25817674835.773857
2011	24931763608.08709
2012	24109339461.625042
2013	28231415426.153744
2014	29802208974.137432
2015	31202036633.834457
2016	32876141120.903175
2017	35329350641.69884
2018	33641007755.683617
2019	40329797021.96951