Year	Percent
1950	8.61731
1955	8.10716
1960	7.66207
1965	7.2813
1970	6.95245
1975	6.79351
1980	6.67209
1985	6.51222
1990	6.86473
1995	6.62282
2000	6.1888
2005	5.76566
2010	5.27262
2015	5.09302
2020	4.85767
2025	4.68815
2030	4.80853
2035	4.8255
2040	4.88837
2045	5.36581
2050	6.4995
2055	7.87253
2060	9.50784
2065	11.20459
2070	13.04897
2075	14.90261
2080	16.78135
2085	18.68499
2090	20.54047
2095	22.31075
2100	23.99965