Year	Percent
1950	10.9794
1955	7.05405
1960	7.74717
1965	10.93781
1970	12.68772
1975	13.24962
1980	11.7728
1985	11.39767
1990	11.24145
1995	11.74077
2000	12.4329
2005	11.82299
2010	9.58581
2015	8.0218
2020	8.5796
2025	8.71775
2030	8.22161
2035	7.32599
2040	6.59443
2045	6.29627
2050	6.23251
2055	6.13999
2060	5.88104
2065	5.57116
2070	5.33787
2075	5.24374
2080	5.22766
2085	5.20879
2090	5.14071
2095	5.03535
2100	4.94645