In last year’s roundup of top business and economic stories, we wrote that, “For many Clark County businesses, the new year can’t come soon enough.” Twelve months have passed, and we could probably say the exact same thing about 2010 — although many businesses would rather skip ahead a few more years. The Columbian’s top 2010 business stories tell of economic problems that have lasted far longer than most of us expected, with high unemployment, an insistently stagnant housing market, and no obvious signs of a turnaround.But not all was gloom and doom in 2010. The merger of PeaceHealth and Southwest Washington Medical Center will bring 340 jobs and a major new company headquarters to Clark County. The tech sector has boomed this year, and Clark County is sharing in the industry’s wealth. Several other growth announcements — by employers including RS Medical, FarWest Steel and BHP Billiton — did not make our Top 5 stories list, but do hint that companies should eventually start hiring again.Rounding out our Top 5 list is a story with roots that trace back two years, to the final months of the Bank of Clark County. Before its failure, an executive tried to hide appraisals from federal regulators. After pleading guilty, he was sentenced to four months in prison.1. Economic strugglesTalk about doldrums. Clark County’s unemployment rate — which has been above 10 percent for more than two years — now seems stuck at 13 percent.