Year	Percent
1950	9.98146
1955	10.54586
1960	11.62207
1965	11.65976
1970	12.27423
1975	11.79639
1980	11.45275
1985	10.6342
1990	10.81165
1995	10.58653
2000	9.42937
2005	8.62079
2010	8.35335
2015	8.52267
2020	8.56505
2025	7.87665
2030	7.33997
2035	6.84296
2040	6.59105
2045	6.56361
2050	6.50998
2055	6.25934
2060	5.91302
2065	5.62481
2070	5.47876
2075	5.44449
2080	5.44164
2085	5.3535
2090	5.19631
2095	5.04698
2100	4.98016