Year	Percent
1950	12.65794
1955	12.57854
1960	13.99648
1965	15.82262
1970	13.50938
1975	10.41936
1980	9.37901
1985	7.75906
1990	7.2413
1995	7.30049
2000	7.96388
2005	6.8165
2010	5.91883
2015	5.22965
2020	4.94697
2025	4.63236
2030	4.39686
2035	4.27347
2040	4.10776
2045	3.94202
2050	3.82464
2055	3.76627
2060	3.7477
2065	3.74584
2070	3.731
2075	3.69684
2080	3.65308
2085	3.62778
2090	3.61028
2095	3.60369
2100	3.59276