Year	Percent
1950	7.45429
1955	6.11344
1960	5.41051
1965	5.16295
1970	5.13836
1975	5.22835
1980	5.30176
1985	5.33065
1990	5.59132
1995	5.56071
2000	5.37429
2005	5.09135
2010	4.90618
2015	5.0879
2020	5.2534
2025	5.40795
2030	5.55726
2035	5.80786
2040	6.2384
2045	6.84371
2050	7.62231
2055	8.54348
2060	9.58156
2065	10.73449
2070	11.98707
2075	13.29099
2080	14.63671
2085	16.01916
2090	17.42763
2095	18.84277
2100	20.24979