Year	Percent
1950	14.49416
1955	15.95917
1960	15.75072
1965	17.6816
1970	13.51234
1975	18.0074
1980	10.95075
1985	13.56383
1990	9.14646
1995	10.67864
2000	7.79603
2005	6.91418
2010	7.05518
2015	6.69004
2020	6.16357
2025	5.83151
2030	5.70136
2035	5.60484
2040	5.42328
2045	5.213
2050	4.98583
2055	4.82678
2060	4.7175
2065	4.60526
2070	4.46572
2075	4.30305
2080	4.13976
2085	4.00719
2090	3.91796
2095	3.86478
2100	3.8176