Year	Percent
1950	14.70655
1955	14.73763
1960	14.7897
1965	15.20894
1970	16.05226
1975	14.87433
1980	13.19995
1985	12.97462
1990	12.57816
1995	12.39851
2000	11.40224
2005	10.50793
2010	9.91504
2015	9.4369
2020	8.94453
2025	8.40253
2030	7.87294
2035	7.41282
2040	7.00058
2045	6.647
2050	6.34317
2055	6.0606
2060	5.81802
2065	5.60705
2070	5.43232
2075	5.28772
2080	5.16717
2085	5.06558
2090	4.98225
2095	4.90921
2100	4.85459