Year	Percent
1950	14.60964
1955	14.619
1960	15.10421
1965	15.13442
1970	15.6546
1975	12.86701
1980	11.68016
1985	10.34048
1990	9.48092
1995	8.5003
2000	9.00839
2005	7.86255
2010	7.38892
2015	6.22155
2020	5.22979
2025	4.96546
2030	4.94185
2035	4.96656
2040	4.84528
2045	4.6098
2050	4.3771
2055	4.27456
2060	4.32811
2065	4.43291
2070	4.48234
2075	4.4573
2080	4.40309
2085	4.39284
2090	4.4577
2095	4.55755
2100	4.62483