Year	Percent
1950	6.59877
1955	6.64124
1960	6.8611
1965	6.81849
1970	7.20141
1975	8.05101
1980	8.62536
1985	7.17975
1990	11.1702
1995	10.20498
2000	10.35043
2005	9.92627
2010	9.63727
2015	10.16261
2020	11.33952
2025	13.40726
2030	14.25944
2035	15.51557
2040	17.41507
2045	20.68649
2050	25.05179
2055	27.94182
2060	29.94643
2065	31.0844
2070	32.65948
2075	34.60994
2080	36.5229
2085	37.90117
2090	38.68559
2095	39.23078
2100	39.91147