California ain’t having a great summer. Its economy remains crippled by the housing bust. Its unemployment rate is the nation’s third-highest, after Nevada and Rhode Island. And officials in four of its cities — Stockton, Mammoth Lakes, Compton and San Bernardino — recently filed or indicated they might file for bankruptcy protection. Well, here’s one more not-so-golden medal for the Golden State: It has the worst involuntary-part-time-worker problem. According to new Labor Department figures, California’s average unemployment rate from July 2011 through June 2012 was 11.2% … but its broader “under-employment” rate was a whopping 20.3%. While it’s the government’s unemployment rate that moves headlines every month — the latest, for July, comes out Friday — the “under-employment” rate, or “U-6” rate, includes everyone else affected by the moribund job market: people who want to work but haven’t looked in the last four weeks because they figured no jobs were available and those working part-time gigs but would prefer full-time positions. (By the way, the government’s number-crunchers prefer “four-quarter moving averages” when it comes to state data because of it’s smaller sample size. By taking in longer time spans, the government may boost the reliability of the findings.) Continue reading for a sortable chart of underemployment by state.