(CNN)– Lottery jackpots keep getting bigger. Saturday, Dec. 13’s Powerball jackpot is worth an estimated $1 billion. It will be the 14th-ever top U.S. lottery prize of at least a billion. In the last five years, it’s happened 12 times. One reason is ticket prices have increased. An other reason is that lotteries have made the odds of winning a jackpot steeper. Finally, a lot more states participate in the lottery than in years past. Categories: News Tags: Powerball, Powerball Jackpot, Powerball ticket ...read more read less