Year	current US$
2002	59999.9986588955
2006	219999.998807907
2007	280000.001192093
2008	529999.971389771
2009	140000.000596046
2011	129999.995231628
2016	9999.99977648258
2020	19999.9995529652
2021	19999.9995529652
2022	19999.9995529652