Year	Percent
1950	9.10563
1955	8.92138
1960	8.23209
1965	7.56148
1970	8.79057
1975	9.54016
1980	11.36899
1985	11.18821
1990	11.17211
1995	10.8093
2000	11.24593
2005	12.61626
2010	10.14337
2015	7.68379
2020	6.76126
2025	8.09986
2030	9.94521
2035	9.01576
2040	7.97932
2045	7.1967
2050	6.83556
2055	6.88518
2060	7.11825
2065	7.23936
2070	6.97987
2075	6.50234
2080	6.14709
2085	6.02102
2090	6.05122
2095	6.10053
2100	6.04413