Year	Percent
1950	11.84789
1955	11.74998
1960	12.21389
1965	11.93426
1970	11.73487
1975	11.3423
1980	10.84662
1985	10.88953
1990	11.5215
1995	11.51901
2000	10.53791
2005	9.45495
2010	9.05691
2015	9.85314
2020	11.02219
2025	12.23691
2030	13.76878
2035	15.16842
2040	16.42245
2045	17.61577
2050	18.8155
2055	19.6877
2060	20.56933
2065	21.4073
2070	22.0187
2075	22.70458
2080	23.24214
2085	23.67041
2090	24.02258
2095	24.34336
2100	24.62118