How cannabis is consumed. In a 2010 National Survey on Drug Use and Health (NSDUH), 17.4 million people in the United States said they had used marijuana in the past month. According to the survey, marijuana is the most commonly used illegal drug.
Now the largest city in Pennsylvania, Philadelphia served as the nationâs capital from 1790 until a permanent capital was established in Washington, D.C., in 1800. Both the Declaration of Independence and the U.S. Constitution were signed in Philadelphia.
Pennsylvania was first colonized by Swedish and Dutch settlers in the 17th century, before the English took control of the colony in 1667. In 1681, William Penn established a colony based on religious tolerance; it and its chief city, Philadelphia (the first planned city), was settled by many Quakers.