Year	Percent
1950	3.11848
1955	3.40681
1960	4.3387
1965	5.41926
1970	6.89484
1975	8.44035
1980	9.46244
1985	9.44524
1990	11.71054
1995	11.21893
2000	12.39499
2005	13.31071
2010	16.5282
2015	19.7216
2020	23.59868
2025	27.87225
2030	30.54659
2035	32.13718
2040	32.87283
2045	32.47954
2050	31.27002
2055	31.7328
2060	32.66186
2065	33.50237
2070	34.28834
2075	34.30839
2080	34.45072
2085	34.80337
2090	35.36031
2095	35.88817
2100	36.2462