The Missouri Lottery is marking 25 years’ worth of ticket sales. Lottery officials were being joined Tuesday by state education officials for an anniversary event in the Missouri Capitol building. A constitutional amendment authorizing a state lottery was approved by Missouri voters in November 1984. But it wasn’t until Jan. 20, 1986, that the sales began with a game called “Jackpot ’86.” From its first year through the end of the 2010 fiscal year, the lottery has recorded nearly $13 billion in sales. In 1992, voters approved a constitutional amendment that earmarks lottery proceeds for public education.