Year	Percent
1950	12.06366
1955	10.94092
1960	10.87329
1965	11.90863
1970	11.93517
1975	11.83648
1980	11.73869
1985	11.6879
1990	11.65647
1995	11.28423
2000	10.33294
2005	9.57521
2010	9.37814
2015	8.82729
2020	8.35713
2025	7.95762
2030	7.40572
2035	6.96743
2040	6.53455
2045	6.23331
2050	5.97433
2055	5.77048
2060	5.57602
2065	5.39056
2070	5.23376
2075	5.12822
2080	5.05325
2085	5.01049
2090	4.96283
2095	4.91639
2100	4.86859