Year	Percent
1950	10.47031
1955	11.44018
1960	14.67695
1965	14.58247
1970	14.16882
1975	13.14588
1980	12.9734
1985	12.28925
1990	11.49886
1995	10.33232
2000	9.59681
2005	9.41236
2010	7.99119
2015	7.49457
2020	7.31997
2025	6.46191
2030	6.50173
2035	6.22483
2040	5.52105
2045	4.80988
2050	4.46873
2055	4.51476
2060	4.70289
2065	4.77145
2070	4.60312
2075	4.3554
2080	4.224
2085	4.29222
2090	4.46251
2095	4.58391
2100	4.56444