Year	Percent
1950	14.74004
1955	14.84593
1960	15.52794
1965	15.47489
1970	15.97428
1975	13.17525
1980	11.90562
1985	10.51299
1990	9.67896
1995	8.63031
2000	9.19196
2005	8.04941
2010	7.59915
2015	6.40316
2020	5.4025
2025	5.14957
2030	5.14401
2035	5.18718
2040	5.07572
2045	4.83842
2050	4.59849
2055	4.49015
2060	4.54219
2065	4.64508
2070	4.6874
2075	4.65019
2080	4.58196
2085	4.56126
2090	4.61689
2095	4.70827
2100	4.76689