Year	current US$
2012	5455237.034708261
2013	5787297.794595363
2014	5782139.979302879
2015	8219599.924981587
2016	7888480.115681896
2017	6739029.981195926
2018	13127268.671989433
2019	18219789.83283043
2020	15124803.300946957
2021	15205499.999225138
2022	13494419.097900392