Year	Percent
1950	12.76202
1955	13.77474
1960	13.17806
1965	13.28732
1970	13.65416
1975	13.78189
1980	14.28816
1985	10.6752
1990	13.31087
1995	13.32985
2000	16.91036
2005	17.73201
2010	14.53949
2015	14.79294
2020	14.58763
2025	13.8918
2030	13.55435
2035	13.13687
2040	12.52591
2045	11.83069
2050	11.15712
2055	10.51803
2060	9.9704
2065	9.44793
2070	8.94964
2075	8.44212
2080	7.95365
2085	7.53347
2090	7.14998
2095	6.83039
2100	6.53448