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.
Cavities in the lung may be caused by diseases such as: 1  Tuberculosis. 2  Coccidioidomycosis. 3  Cystic fibrosis. 4  Histoplasmosis. Lung abscess.  Lung 1  cancer. Sarcoidosis.