Year	Percent
1950	11.91987
1955	12.45253
1960	12.76227
1965	13.22579
1970	13.99025
1975	13.3414
1980	12.42961
1985	11.3516
1990	11.70524
1995	11.96402
2000	11.19382
2005	9.87068
2010	9.2374
2015	9.17205
2020	9.61648
2025	9.24425
2030	8.65212
2035	8.1866
2040	7.92082
2045	7.7412
2050	7.50813
2055	7.2414
2060	6.97011
2065	6.70674
2070	6.47513
2075	6.28204
2080	6.13441
2085	5.99788
2090	5.852
2095	5.71772
2100	5.59058