This chart shows the results of Gallup Polls taken in the 21st Century, with the latest being done between October 5th and 11th of a random national sample of 1,028 adults, with a 4 point margin of error. Note that the percentage wanting stricter gun laws has been rising since 2011 (now at 60%), while those wanting to keep the laws as they are or make them less strict have been falling.
