Year	Percent
1950	16.27678
1955	15.48872
1960	16.81259
1965	17.53682
1970	17.64152
1975	17.37643
1980	17.26971
1985	17.21153
1990	17.31367
1995	16.02386
2000	14.50639
2005	12.93271
2010	13.06387
2015	12.91612
2020	12.0191
2025	10.97599
2030	10.0882
2035	9.49748
2040	9.11483
2045	8.71355
2050	8.18595
2055	7.62915
2060	7.1692
2065	6.83532
2070	6.57192
2075	6.33112
2080	6.07475
2085	5.82535
2090	5.60961
2095	5.45509
2100	5.34248