Year	Percent
1950	8.52457
1955	9.24934
1960	10.02513
1965	9.55692
1970	9.16584
1975	9.41459
1980	9.74117
1985	9.92436
1990	10.04216
1995	10.2002
2000	10.31117
2005	10.44231
2010	10.55522
2015	10.55407
2020	10.50561
2025	10.5316
2030	10.45996
2035	10.26686
2040	10.08927
2045	9.90534
2050	9.70749
2055	9.50203
2060	9.27168
2065	9.03185
2070	8.80358
2075	8.58119
2080	8.38271
2085	8.16604
2090	7.9599
2095	7.75537
2100	7.56565