Year	Percent
1950	12.90253
1955	12.28761
1960	11.42353
1965	12.71299
1970	13.56058
1975	13.87602
1980	13.73267
1985	13.73549
1990	13.96122
1995	14.47948
2000	13.69153
2005	12.85091
2010	11.69199
2015	11.7452
2020	11.77893
2025	11.11084
2030	10.27642
2035	9.50764
2040	9.0299
2045	8.75102
2050	8.43253
2055	8.0201
2060	7.56082
2065	7.176
2070	6.90577
2075	6.70346
2080	6.52117
2085	6.31772
2090	6.11423
2095	5.93956
2100	5.8175