Year	Percent
1950	13.5451
1955	13.24314
1960	12.95216
1965	12.89626
1970	12.47341
1975	12.2444
1980	11.98778
1985	11.62005
1990	11.1903
1995	11.77911
2000	11.22176
2005	10.49182
2010	10.22683
2015	10.32622
2020	11.14012
2025	13.29502
2030	16.49385
2035	19.5073
2040	21.48496
2045	22.29775
2050	22.65825
2055	23.23802
2060	24.28307
2065	25.31987
2070	25.87744
2075	26.07418
2080	26.10836
2085	26.19684
2090	26.30138
2095	26.30128
2100	26.13398