Year	Percent
1950	12.35994
1955	12.48966
1960	12.49699
1965	13.10606
1970	13.84455
1975	15.03165
1980	12.44349
1985	11.21375
1990	10.00816
1995	9.01802
2000	8.24608
2005	8.90251
2010	7.8724
2015	7.52277
2020	6.32408
2025	5.35989
2030	5.13127
2035	5.15755
2040	5.23921
2045	5.16064
2050	4.94099
2055	4.70352
2060	4.59401
2065	4.65053
2070	4.7633
2075	4.81748
2080	4.78926
2085	4.72355
2090	4.70136
2095	4.75217
2100	4.83322