Year	Percent
1950	13.13518
1955	12.0267
1960	6.75654
1965	7.59783
1970	10.34598
1975	12.36931
1980	13.72125
1985	11.36937
1990	9.8855
1995	8.72629
2000	10.09361
2005	11.21936
2010	10.13989
2015	7.92145
2020	6.78087
2025	7.16728
2030	8.63184
2035	7.74945
2040	6.69609
2045	6.09903
2050	6.08311
2055	6.19761
2060	6.14291
2065	5.93267
2070	5.71419
2075	5.57235
2080	5.55663
2085	5.58668
2090	5.57791
2095	5.515
2100	5.42811