1915: There are 4,300,330 visitors to Kew Gardens. In 1916, the number falls to 713,922 after the institution of an entrance fee.

1990s: About one million people visit Kew Gardens annually.

1918: The fourth Reform Act increases the electorate from eight to twenty-one million. The Reform Act gives all men over the age of twentyone the right to vote, while women over thirty are granted voting rights. In the United States, women's suffrage is guaranteed by the nineteenth amendment to the Constitution, ratified in 1920. In 1928, all men and women over twenty-one who meet the residency requirement are entitled to vote.

1990s: All men and women eighteen and older can vote in England and the United States.