Year	Percent
1950	10.55295
1955	9.96733
1960	9.24586
1965	10.14775
1970	11.46199
1975	9.99218
1980	9.33953
1985	9.45242
1990	8.4029
1995	8.25881
2000	8.43063
2005	8.03996
2010	7.55807
2015	6.31258
2020	5.80594
2025	5.35584
2030	5.54213
2035	5.59188
2040	5.48402
2045	5.23708
2050	4.98135
2055	4.86885
2060	4.9242
2065	5.05143
2070	5.12413
2075	5.08328
2080	4.98919
2085	4.92726
2090	4.94045
2095	5.00136
2100	5.0349