Year	Percent
1950	10.23869
1955	10.83988
1960	10.79614
1965	11.85289
1970	11.84022
1975	11.77251
1980	11.49181
1985	10.27617
1990	9.29269
1995	9.16034
2000	9.32504
2005	8.64977
2010	7.7766
2015	7.09508
2020	6.76891
2025	6.31369
2030	6.04454
2035	5.79717
2040	5.55718
2045	5.32784
2050	5.14959
2055	5.03545
2060	4.94826
2065	4.88703
2070	4.82961
2075	4.77951
2080	4.73312
2085	4.7161
2090	4.70701
2095	4.70233
2100	4.69662