Year	Percent
1950	15.31518
1955	17.16122
1960	16.13404
1965	16.33063
1970	15.00011
1975	12.23104
1980	8.10099
1985	8.36746
1990	8.41905
1995	7.59874
2000	7.08287
2005	6.27785
2010	6.03581
2015	5.156
2020	5.37336
2025	5.07996
2030	5.0656
2035	5.16947
2040	5.16529
2045	4.94224
2050	4.72128
2055	4.68191
2060	4.75593
2065	4.84995
2070	4.88565
2075	4.80739
2080	4.66029
2085	4.54919
2090	4.52561
2095	4.54646
2100	4.57533