WASHINGTON (AP) — U.S. home prices posted another big gain in January, pushed higher by a shortage of homes for sale.

Standard & Poor's says its S&P CoreLogic Case-Shiller national home price index climbed 6.2 percent in January from a year earlier. That nearly matches December's 6.3 percent gain, which had been the fastest 12-month growth in nearly three years.

The price of houses is easily outpacing wage growth and inflation.

Prices rose 12.9 percent in Seattle, 11.1 percent in Las Vegas and 10.2 percent in San Francisco. Chicago and Washington D.C. posted the weakest annual home-prices gains: 2.4 percent.

Homes for sale are scarce. It would take just 3.4 months to snap up the supply of available homes at the current sales rate, down from an average since 2000 of 6 months.