Year	Percent
1950	11.87315
1955	12.58304
1960	12.02875
1965	13.08047
1970	13.53472
1975	13.96972
1980	13.52744
1985	12.97005
1990	12.31133
1995	11.65367
2000	10.67055
2005	10.02322
2010	9.46555
2015	8.42829
2020	8.1144
2025	7.42135
2030	6.94444
2035	6.45207
2040	6.0401
2045	5.74029
2050	5.54612
2055	5.3764
2060	5.207
2065	5.0485
2070	4.89609
2075	4.79073
2080	4.73175
2085	4.69353
2090	4.64753
2095	4.59787
2100	4.5566