Year	current US$
2005	51000000
2006	17000000
2007	22000000
2008	33000000
2009	28000000
2010	24000000
2011	37000000
2012	39000000
2013	51000000
2014	48000000
2015	65000000
2016	58000000
2017	39000000
2018	41000000
2019	50000000
2020	21000000
2021	17000000
2022	38000000
2023	37000000