Year	Percent
1950	12.98049
1955	12.68308
1960	14.97002
1965	15.16919
1970	15.39833
1975	15.12307
1980	15.16759
1985	15.21389
1990	14.76668
1995	13.61965
2000	11.82076
2005	9.16531
2010	8.12334
2015	9.62406
2020	10.71798
2025	9.43926
2030	8.19804
2035	7.19347
2040	6.68468
2045	6.61901
2050	6.7052
2055	6.63697
2060	6.26717
2065	5.79625
2070	5.48921
2075	5.39605
2080	5.42143
2085	5.42298
2090	5.32057
2095	5.14089
2100	4.97928