Year	Percent
1950	10.87998
1955	10.39324
1960	12.46329
1965	13.68983
1970	13.57519
1975	14.45521
1980	13.04458
1985	11.01622
1990	10.47291
1995	8.61099
2000	8.42338
2005	8.70685
2010	8.93827
2015	7.91159
2020	6.99496
2025	6.45709
2030	5.75308
2035	5.84043
2040	6.21566
2045	6.29899
2050	6.02936
2055	5.66136
2060	5.38842
2065	5.31431
2070	5.39635
2075	5.43031
2080	5.30927
2085	5.09508
2090	4.92538
2095	4.88152
2100	4.93512