Year	Percent
1950	9.96803
1955	10.25911
1960	10.34217
1965	10.04203
1970	9.68287
1975	9.42437
1980	9.84647
1985	10.89491
1990	10.00424
1995	9.72941
2000	9.45791
2005	8.8343
2010	8.68763
2015	8.38218
2020	8.15837
2025	7.7906
2030	7.42773
2035	7.11011
2040	6.82463
2045	6.56873
2050	6.33404
2055	6.11727
2060	5.90771
2065	5.72195
2070	5.57389
2075	5.44647
2080	5.3432
2085	5.24568
2090	5.15244
2095	5.07379
2100	5.0037