Year	Percent
1950	10.30531
1955	10.53104
1960	10.62558
1965	10.45435
1970	9.48411
1975	9.94646
1980	10.10769
1985	10.22381
1990	10.20869
1995	10.66361
2000	12.52618
2005	12.68079
2010	10.71108
2015	9.84
2020	10.78381
2025	11.27736
2030	10.68631
2035	10.04388
2040	9.49189
2045	9.17355
2050	9.01723
2055	8.80909
2060	8.46869
2065	8.06022
2070	7.70043
2075	7.43061
2080	7.216
2085	6.99652
2090	6.731
2095	6.4657
2100	6.23358