Jury Duty

I have a summons for jury duty this week. I haven’t actually been called in, and it looks like I won’t this time. I was doing some reading on the California Courts website. According to their Facts About Jury Service, about 10 million people receive a juror summons, but only 180,000 actually serve on a jury. That works out to about 1.8 percent. Why are they sending so many summons and wasting so many people’s time?