Year	Percent
1950	13.77246
1955	14.93993
1960	13.93216
1965	14.94904
1970	15.16082
1975	13.68302
1980	11.51731
1985	11.55484
1990	11.73548
1995	11.22979
2000	10.16971
2005	9.09619
2010	7.7707
2015	7.3291
2020	6.7794
2025	6.3352
2030	5.87455
2035	5.49783
2040	5.19719
2045	4.96514
2050	4.81358
2055	4.69089
2060	4.58577
2065	4.48592
2070	4.41873
2075	4.37824
2080	4.36581
2085	4.371
2090	4.37447
2095	4.37456
2100	4.37169