Year	Percent
1950	16.64246
1955	16.16495
1960	18.63978
1965	16.51836
1970	14.36108
1975	13.14971
1980	10.82491
1985	9.72985
1990	7.71691
1995	8.17408
2000	6.98653
2005	5.38764
2010	4.76285
2015	4.5554
2020	4.5526
2025	4.54617
2030	4.56191
2035	4.35663
2040	3.99818
2045	3.85102
2050	3.94108
2055	4.13895
2060	4.33843
2065	4.45025
2070	4.41488
2075	4.30179
2080	4.27644
2085	4.38108
2090	4.53843
2095	4.65657
2100	4.66261