Year	Percent
1950	7.91611
1955	8.22507
1960	8.05536
1965	7.63354
1970	6.94401
1975	6.43317
1980	5.16731
1985	4.33754
1990	4.39808
1995	4.33886
2000	4.43203
2005	4.77124
2010	5.11109
2015	5.52534
2020	5.99847
2025	6.66926
2030	7.58981
2035	8.92977
2040	10.19035
2045	10.91366
2050	11.57237
2055	12.46349
2060	14.24011
2065	16.37832
2070	18.92931
2075	21.1675
2080	23.17032
2085	25.07927
2090	26.94321
2095	28.74493
2100	30.43153