Year	Percent
1950	12.05093
1955	12.14233
1960	12.71007
1965	12.61156
1970	12.57215
1975	12.22567
1980	11.77191
1985	11.78482
1990	12.16725
1995	11.88323
2000	11.13838
2005	10.21812
2010	9.76841
2015	10.37434
2020	11.34515
2025	12.44047
2030	13.93864
2035	15.36523
2040	16.64778
2045	17.85068
2050	19.00309
2055	19.79942
2060	20.60922
2065	21.37567
2070	21.92842
2075	22.57484
2080	23.0753
2085	23.46715
2090	23.78271
2095	24.06636
2100	24.30803