Year	Percent
1950	16.56212
1955	16.56856
1960	16.31704
1965	16.1428
1970	15.95358
1975	15.7974
1980	15.62972
1985	15.30224
1990	15.21927
1995	16.11699
2000	17.12028
2005	18.25918
2010	19.35646
2015	20.20424
2020	21.17668
2025	22.489
2030	23.88344
2035	25.16403
2040	26.32158
2045	27.14078
2050	27.64554
2055	27.6111
2060	27.47401
2065	27.23434
2070	27.0097
2075	26.99451
2080	26.7512
2085	26.37524
2090	25.97475
2095	25.65234
2100	25.42343