Year	Percent
1950	15.55531
1955	16.34842
1960	15.95842
1965	14.6577
1970	10.05789
1975	8.97451
1980	7.95803
1985	7.30316
1990	6.3081
1995	5.19755
2000	4.11468
2005	3.01531
2010	3.014
2015	3.39294
2020	4.30622
2025	4.44051
2030	4.30188
2035	3.72559
2040	3.4123
2045	3.49501
2050	3.82041
2055	4.16109
2060	4.35039
2065	4.31982
2070	4.17604
2075	4.12697
2080	4.25764
2085	4.49012
2090	4.67183
2095	4.71324
2100	4.6061