Year	Percent
1950	13.78805
1955	16.73813
1960	14.56875
1965	15.93852
1970	16.25663
1975	13.70805
1980	10.16832
1985	9.94661
1990	11.47104
1995	8.55099
2000	6.59607
2005	6.25424
2010	6.35467
2015	6.40343
2020	5.88472
2025	5.26148
2030	4.85862
2035	4.6753
2040	4.65287
2045	4.67953
2050	4.63625
2055	4.51358
2060	4.39105
2065	4.3617
2070	4.40824
2075	4.48795
2080	4.53821
2085	4.53687
2090	4.50561
2095	4.48488
2100	4.50081