but it's not all rosey. there are still some troubling signs as well. business and technology reporter david lou tonight with the good news and the bad. >> first sign of recovery on the job front. 2012 silicon valley index says 42,000 jobs added in the past year. increase of 3.8%. that translates that 1.two million people working in 2011 nearly matching the 1.3 million in the work force prayer to the recession. start up back by venture capitol appear on the come back. venture capitol investments rose 17 percent last year totalling 7. 6 billion dollars. and there were 12 i p o. initial public offerings in 2011. compared to 11 in 2010 the and only one in 2009. while employment is up, income is down. the median silicon valley income is 86,000 dollars. down 3 percent from a year ago. while household making 100,000 or more are on the rise, up 7 and a half percent, there is concern over a nearly 4 percent decline in families making under 100,000. >> tech is not a big job generator any more because the tech we invented also eliminated whole classes of jobs. su