How many more years do you have to go? <a href=" http://thejnpproject.com/what-is-ciprofloxacin-hcl-500mg-used-for.pdf#key ">ciprofloxacino para que esta indicado</a> Sales of big SUVs hit 237,000 last year, up 4.5 percent from the 2009 trough but still only a quarter of what they were in the boom years. Experts suspect drivers have become accustomed to high gas prices, which have averaged around $3.50 nationwide since 2011. Because they carry up to eight people, Suburbans and Yukons are more efficient than driving two cars, said Chris Hemmersmeier, CEO of a 10-franchise dealership chain in Salt Lake City, where there's an abundance of big families and people who travel into nearby mountains.