Answer:
In the United States, there are no processes of citizen initiatives at the federal level, but 27 of the 50 states have some kind of direct democracy system (changing the regulation and scope of one state to another). At the local level, approximately half of the cities have a system of binding citizen initiatives.
Between 1904 and 2000 almost 2,000 referendums initiated by the citizenship were convened. In 1996, in the states with citizens' initiative mechanisms, 96 referendums were held, against the more than 14,000 laws and resolutions passed by the representatives of those states.