Year	Percent
1950	12.5839
1955	12.36316
1960	12.98258
1965	13.00044
1970	12.81434
1975	12.61274
1980	13.87484
1985	11.63841
1990	10.35432
1995	9.56324
2000	9.82003
2005	9.11716
2010	7.88895
2015	7.28446
2020	7.31687
2025	7.01248
2030	6.70117
2035	6.42369
2040	6.15735
2045	5.90877
2050	5.72632
2055	5.6135
2060	5.52354
2065	5.42867
2070	5.31346
2075	5.2041
2080	5.11403
2085	5.04943
2090	5.00009
2095	4.95342
2100	4.90217