Year	Percent
1950	8.5614
1955	9.58153
1960	12.91783
1965	14.51426
1970	15.05751
1975	13.86887
1980	13.23141
1985	12.98681
1990	12.76987
1995	13.34354
2000	12.52774
2005	9.77704
2010	9.43458
2015	9.21517
2020	10.81984
2025	9.87961
2030	8.73934
2035	7.84671
2040	7.51754
2045	7.55951
2050	7.51619
2055	7.18763
2060	6.68825
2065	6.28265
2070	6.08468
2075	6.02892
2080	5.98049
2085	5.84109
2090	5.63105
2095	5.43921
2100	5.33257