Year	Percent
1950	16.66892
1955	17.57485
1960	17.71479
1965	17.82102
1970	17.20086
1975	16.16796
1980	15.59718
1985	14.26672
1990	13.5496
1995	12.54943
2000	11.39331
2005	10.51465
2010	9.8374
2015	9.41753
2020	8.70614
2025	8.01493
2030	7.40201
2035	6.90583
2040	6.51379
2045	6.18811
2050	5.87987
2055	5.58763
2060	5.33814
2065	5.14115
2070	4.99026
2075	4.87078
2080	4.76997
2085	4.67801
2090	4.59589
2095	4.53294
2100	4.48584