Year	Percent
1950	15.31415
1955	16.57002
1960	16.77586
1965	16.92444
1970	16.34283
1975	15.69634
1980	16.52995
1985	17.89706
1990	16.85932
1995	15.65894
2000	14.72491
2005	13.65359
2010	12.86316
2015	11.90838
2020	11.17846
2025	10.42741
2030	9.73232
2035	9.11778
2040	8.57442
2045	8.11096
2050	7.67762
2055	7.31057
2060	6.98623
2065	6.73027
2070	6.52466
2075	6.3552
2080	6.20261
2085	6.07094
2090	5.9625
2095	5.86986
2100	5.78798