Year	Percent
1950	3.73614
1955	4.09419
1960	4.38758
1965	4.71029
1970	4.88973
1975	5.01098
1980	5.38356
1985	5.37523
1990	5.59067
1995	5.43411
2000	5.43504
2005	5.46913
2010	5.60284
2015	6.10567
2020	6.71894
2025	7.5872
2030	8.64581
2035	9.97196
2040	11.55226
2045	13.57491
2050	16.06245
2055	18.81505
2060	21.17417
2065	23.15168
2070	25.2161
2075	27.14421
2080	28.92647
2085	30.48118
2090	31.82432
2095	32.97459
2100	33.94088