Year	Percent
1950	13.12225
1955	14.08172
1960	14.18189
1965	14.51342
1970	14.87978
1975	11.51548
1980	10.80534
1985	10.7833
1990	12.05718
1995	10.28417
2000	8.09514
2005	6.66175
2010	6.6528
2015	6.9014
2020	6.70875
2025	6.01915
2030	5.41622
2035	5.08439
2040	5.04639
2045	5.13486
2050	5.14063
2055	4.99923
2060	4.81357
2065	4.71591
2070	4.74187
2075	4.84189
2080	4.91067
2085	4.89442
2090	4.82055
2095	4.76405
2100	4.772