Year	Percent
1950	14.98218
1955	16.0038
1960	15.96962
1965	13.81482
1970	12.95724
1975	10.7575
1980	9.43944
1985	9.1244
1990	9.63108
1995	8.70771
2000	6.95388
2005	6.14325
2010	6.0349
2015	6.30277
2020	6.26197
2025	6.05281
2030	5.86049
2035	5.66807
2040	5.52982
2045	5.47572
2050	5.45703
2055	5.4068
2060	5.30994
2065	5.20234
2070	5.11468
2075	5.04822
2080	5.00064
2085	4.95507
2090	4.90152
2095	4.84723
2100	4.79669