Year	Percent
1950	12.22768
1955	12.37725
1960	15.25536
1965	16.10141
1970	16.48464
1975	15.60061
1980	14.41667
1985	14.0168
1990	14.00687
1995	12.66823
2000	11.7609
2005	10.31094
2010	9.7672
2015	9.36222
2020	9.57075
2025	8.79684
2030	8.04187
2035	7.3974
2040	6.93776
2045	6.64677
2050	6.42538
2055	6.17448
2060	5.87776
2065	5.58734
2070	5.36097
2075	5.21672
2080	5.1284
2085	5.05289
2090	4.95843
2095	4.85764
2100	4.77008