Data Model specification and limits - Related links. 1  Create a memory-efficient Data Model using Excel and the Power Pivot add-in. 2  Workbook Size Optimizer download. 3  Power Pivot: Powerful data analysis and data modeling in Excel.
By 1916, over half of the U.S. states already had statutes that prohibited alcohol. In 1919, the 18th Amendment to the U.S. Constitution, which prohibited the sale and manufacture of alcohol, was ratified. It went into effect on January 16, 1920.
Many states lowered the drinking age to 18 or 19 in the early 1970s, around the same time as the passage of the 26th Amendment granting 18-year-olds the right to vote.