Year	Percent
1950	4.91992
1955	4.6767
1960	4.43621
1965	4.24867
1970	4.14463
1975	4.09297
1980	4.04547
1985	4.0228
1990	4.30432
1995	4.41496
2000	4.46078
2005	4.54087
2010	4.80772
2015	5.0619
2020	5.34546
2025	5.66672
2030	6.05123
2035	6.37787
2040	6.69759
2045	7.10046
2050	7.59803
2055	8.38519
2060	9.34547
2065	10.36105
2070	11.32331
2075	12.18309
2080	12.98303
2085	13.78639
2090	14.64067
2095	15.55565
2100	16.4967