Wetter weather and continued growth in renewable energy sources resulted in some big changes in electricity generation in California in 2016, according to numbers recently released by the California Energy Commission. Natural gas still accounted for the largest single share of in-state power generation but the amount deployed dropped 10 percent last year. The difference was largely replaced by electricity produced by large hydro facilities — home to reservoirs that started to fill up at the end of 2016 as one of the wettest winters on record began — and production from wind and solar, which each posted double-digit growth.