Year	Percent
1950	17.23767
1955	18.56587
1960	18.02796
1965	17.8184
1970	15.5393
1975	14.596
1980	14.13591
1985	14.03983
1990	13.36233
1995	12.55344
2000	11.46517
2005	9.89428
2010	8.66225
2015	8.36474
2020	8.21969
2025	7.84775
2030	7.18994
2035	6.46188
2040	5.91488
2045	5.63783
2050	5.55345
2055	5.48279
2060	5.31989
2065	5.08955
2070	4.88296
2075	4.77202
2080	4.76496
2085	4.79862
2090	4.79613
2095	4.7357
2100	4.65622