City
-- select a city --
Year
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
Try selecting a city (click on the map or use dropdown list).
Try dragging the year slider.
Try zooming in and dragging the map.