Year	Percent
1950	6.60992
1955	6.93705
1960	7.52721
1965	8.26512
1970	8.91102
1975	9.52946
1980	10.0965
1985	11.10207
1990	14.9249
1995	17.63889
2000	20.37426
2005	23.49177
2010	27.40784
2015	29.88389
2020	31.16275
2025	32.43363
2030	34.08981
2035	36.8084
2040	38.24476
2045	39.11403
2050	39.43992
2055	39.36875
2060	39.21716
2065	38.80716
2070	38.44052
2075	38.2174
2080	38.11251
2085	38.08166
2090	38.14195
2095	38.29484
2100	38.52906