Year	Percent
1950	16.03789
1955	17.83289
1960	16.46115
1965	16.94016
1970	15.93004
1975	12.68655
1980	8.54032
1985	8.78949
1990	8.78624
1995	8.03406
2000	7.6139
2005	6.80557
2010	6.70757
2015	5.8601
2020	6.0321
2025	5.72441
2030	5.72814
2035	5.86682
2040	5.88
2045	5.64007
2050	5.39111
2055	5.3339
2060	5.38381
2065	5.43483
2070	5.41185
2075	5.26644
2080	5.06582
2085	4.91971
2090	4.87754
2095	4.89833
2100	4.92543