Year	Percent
1950	14.65467
1955	16.53763
1960	15.81986
1965	15.76511
1970	14.10547
1975	11.80257
1980	7.68666
1985	7.97225
1990	8.07604
1995	7.20006
2000	6.61161
2005	5.81711
2010	5.45932
2015	4.56547
2020	4.82577
2025	4.54729
2030	4.52166
2035	4.60073
2040	4.58576
2045	4.37931
2050	4.18078
2055	4.15441
2060	4.24175
2065	4.36184
2070	4.43748
2075	4.40827
2080	4.30217
2085	4.21915
2090	4.2087
2095	4.23051
2100	4.2606