Year	current US$
1970	17.32292247467867
1971	19.50992324974671
1972	23.17340430047891
1973	31.94719012702837
1974	43.99696721156763
1975	54.491200917861384
1976	73.87541187743909
1977	68.54605007521795
1978	92.2756752283074
1979	92.32703202783587
1980	124.15940176192562
1981	123.26339478385978
1982	106.71175844633024
1983	120.66360803273886
1984	114.50055025133327
1985	95.96645289155799
1986	122.6080088853319
1987	127.28245505106192
1988	121.14342479827167
1989	132.25608515599026
1990	176.00182977034672
1991	163.1945545861858
1992	144.84438144283143
1993	151.86916499273593
1994	153.30674335192805
1995	144.86141261125545
1996	141.68993498652856
1997	118.82842297080138
1998	119.40802756486562
1999	105.87618497420539
2000	97.99750237710803
2001	87.3263661382027
2002	106.59219697766578
2003	108.09626723588411
2004	106.66365617482055
2005	103.18429170208782
2006	113.52940890943489
2007	150.97775797761042
2008	212.39439620093705
2009	182.195831446177
2010	204.2229311724002
2011	195.2320704768201
2012	187.506231175357
2013	184.93493866120727
2014	148.45386399067962
2015	127.08014899912843
2016	127.54878140536682
2017	149.99051301665693
2018	155.12012437344134
2019	148.38589002778644
2020	215.54916790007812
2021	184.0332257300873