…Las Vegas’s rise and fall has been more dramatic than most. Last year, Clark County’s population declined for the first time in more than two decades. More than 10,000 people left Las Vegas between July 2007 and July 2008, according to Keith Schwer, director for the Center for Business and Economic Research at the University of Nevada Las Vegas. The unemployment rate in the metropolitan area tripled from 4% in May 2007 to just over 12.3% in June 2009, higher than the national rate of 9.5%. And after the median price of existing homes rose by 122% in sales between 2000 and 2006 — more than double the national rise of 49% — sale prices fell by 30% between last year and this year.