A 2005 poll found that 78% of Americans did not know residents of the District of Columbia have less representation in Congress than residents of the fifty states. Efforts to raise awareness about the issue have included campaigns by grassroots organizations and featuring the city's unofficial motto, "Taxation Without Representation", on D.C. vehicle license plates. There is evidence of nationwide approval for D.C. voting rights; various polls indicate that 61 to 82% of Americans believe D.C. should have voting representation in Congress.