Year	Percent
1950	14.64808
1955	16.2725
1960	16.26116
1965	16.11566
1970	15.71292
1975	15.34867
1980	14.93968
1985	14.75687
1990	13.95512
1995	12.82511
2000	11.94097
2005	11.12441
2010	10.25916
2015	9.1216
2020	8.6189
2025	8.12616
2030	7.6556
2035	7.15182
2040	6.66899
2045	6.29481
2050	6.01399
2055	5.77672
2060	5.55252
2065	5.35126
2070	5.18111
2075	5.051
2080	4.95773
2085	4.88847
2090	4.82093
2095	4.76069
2100	4.71473