Kazakhs overwhelmingly cast their votes on Sunday for changing the Constitution and making the transition from a "super-presidential" state to a presidential one with a stronger Parliament after violent protests swept the country last January.

According to exit polling by the Public Opinion Institute, 74.8 percent of Kazakh voters supported amending the 1995 Constitution, while SOCIS-A found that 76.7 percent approved such a chance and the Democracy Institute said that 79.4 percent of voters were in favor of the move.

More than eight million Kazakhs, or 68.44 percent of all eligible voters, participated in the country's first referendum in 27 years, according to the Central Electoral Commission (CEC), which will make public the preliminary results of the referendum on Monday.