Year	Percent
1950	9.12831
1955	8.70975
1960	9.36079
1965	9.41455
1970	10.56613
1975	9.92051
1980	9.63338
1985	9.15862
1990	9.71252
1995	10.33767
2000	11.20351
2005	11.36348
2010	11.04831
2015	10.36598
2020	10.11512
2025	10.40429
2030	10.56555
2035	10.30985
2040	9.9092
2045	9.51913
2050	9.26647
2055	9.09451
2060	8.89984
2065	8.64971
2070	8.35093
2075	8.06859
2080	7.83751
2085	7.62271
2090	7.42218
2095	7.19291
2100	6.96061