Year	Percent
1950	11.1573
1955	11.21984
1960	11.79089
1965	11.92701
1970	11.70046
1975	11.59058
1980	12.18837
1985	12.51172
1990	12.17139
1995	12.15258
2000	13.03555
2005	13.52304
2010	11.86264
2015	10.53948
2020	10.25836
2025	9.68679
2030	9.11563
2035	8.45413
2040	7.8319
2045	7.29208
2050	6.82717
2055	6.41949
2060	6.06004
2065	5.75242
2070	5.49975
2075	5.31307
2080	5.1731
2085	5.0585
2090	4.96448
2095	4.89109
2100	4.83711