1880 1920 2007 Austria 14 14 14 Belgium - 16 16 Bulgaria 13 13 14 Denmark 12 12 15 England & Wales 13 16 16 Finland - 12 16 France 13 13 15 Germany 14 14 14 Greece - 12 15 Italy - 16 14 Luxembourg 15 15 16 Norway - 16 16 Portugal 12 12 14 Romania 15 15 15 Russia 10 14 16 Scotland 12 12 16 Spain 12 12 13 Sweden 15 15 15 Switzerland various 16 16 Turkey 15 15 18 Argentina - 12 13 Brazil - 16 14 Chile 20 20 18 Ecuador - 14 14 Canada 12 14 14 Australia  New South Wales 12 16 16 Queensland 12 17 16 Victoria 12 16 16 Western Australia 12 14 16 United States  Alabama 10 16 16 Alaska - 16 16 Arizona 12 18 18 Arkansas 10 16 16 California 10 18 18 Colorado 10 18 15 Connecticut 10 16 16 District of Columbia 12 16 16 Delaware 7 16 16 Florida 10 18 18 Georgia 10 14 16 Hawaii - - 16 Idaho 10 18 18 Illinois 10 16 17 Indiana 12 16 16 Iowa 10 16 16 Kansas 10 18 16 Kentucky 12 16 16 Louisiana 12 18 17 Maine 10 16 16 Maryland 10 16 16 Massachusetts 10 16 16 Michigan 10 16 16 Minnesota 10 18 16 Mississippi 10 18 16 Missouri 12 18 17 Montana 10 18 16 Nebraska 10 18 17 Nevada 12 18 16 New Hampshire 10 16 16 New Jersey 10 16 16 New Mexico 10 16 17 New York 10 18 17 North Carolina 10 16 16 North Dakota 10 18 18 Ohio 10 16 16 Oklahoma - - 16 Oregon 10 16 18 Pennsylvania 10 16 16 Rhode Island 10 16 16 South Carolina 10 16 16 South Dakota 10 18 16 Tennessee 10 18 18 Texas 10 18 17 Utah 10 18 16 Vermont 10 16 16 Virginia 12 16 18 Washington 12 18 16 West Virginia 12 16 16 Wisconsin 10 16 18 Wyoming 10 16 16