An ideal response would be:
Unlike the federal Constitution, amended only 27 times in more than 220 years, most state constitutions are amended on a regular basis. Although no entirely new state constitution has been adopted since the 1980s, the process of constitutional amendment allows state governments and voters to modify and modernize constitutions to fit changing conditions. Nearly 1,300 amendments were proposed between 1998 and 2012, affecting nearly every state constitution. Many were limited in scope, concerning only local issues or specific state agencies. However, others affected states' bills of rights, broad finance and taxation issues, and electoral processes.