Year	Percent
1950	10.2814
1955	10.30948
1960	11.64576
1965	12.91915
1970	14.49042
1975	15.25059
1980	13.85041
1985	11.75795
1990	9.61985
1995	10.4714
2000	10.38019
2005	10.21583
2010	9.89806
2015	9.20682
2020	8.79129
2025	8.56729
2030	8.19008
2035	7.80706
2040	7.44211
2045	7.12701
2050	6.84997
2055	6.62791
2060	6.43602
2065	6.26826
2070	6.10241
2075	5.95185
2080	5.82071
2085	5.7055
2090	5.61799
2095	5.53564
2100	5.45971