LAS VEGAS (AP) — Nevada has posted the nation's highest foreclosure rate for 61st month in a row, even though foreclosure activity is down 52 percent from a year ago.Foreclosure tracking firm RealtyTrac says Thursday that 5,931 properties in the state had a foreclosure filing in January. That's a 52-month low.The pace of Nevada foreclosures took a dive when a state law took effect in October requiring lenders to provide more documentation to foreclose.Las Vegas has the 5th highest foreclosure rate among metro areas with a population of 200,000 or more. One in every 172 properties got a filing in January.Nine of the ten other areas on that list are in California, with the central valley city of Stockton claiming the top spot for the fourth month in a row.