In 1981, Reagan persuaded Congress to reduce the top tax rate form 70% to 50% and to index tax brackets (so that inflation was taken into consideration). In 1986, the Tax Reform Act reduced the rate on the wealthiest Americans to 28%.
Causes. Cavities are caused by tooth decay â a process that occurs over time. Here's how tooth decay develops: 1  Plaque forms. 2  Your mouth naturally contains many types of bacteria. 3  Some thrive on food and drinks that contain certain forms of sugar.
How to Keep a Cavity from Getting Worse. Cavities, small holes in your teeth that can enlarge over time, occur when the protective enamel of your teeth is eaten away by acids and bacteria. When the enamel is removed, the cavity continues...