Year	Percent
1950	10.2378
1955	10.72626
1960	11.83313
1965	13.63982
1970	13.55966
1975	14.27502
1980	13.95168
1985	11.36676
1990	9.91955
1995	9.29862
2000	9.50958
2005	8.75836
2010	8.19138
2015	8.30369
2020	7.5833
2025	7.22433
2030	6.6441
2035	6.35203
2040	6.21629
2045	6.07894
2050	5.8772
2055	5.64092
2060	5.44227
2065	5.29656
2070	5.1988
2075	5.10428
2080	4.99754
2085	4.87767
2090	4.77201
2095	4.70188
2100	4.6632