HOLLAND, MI (WHTC) - Gas prices along the Lakeshore took a hike up overnight. Rates that were getting around the $3.30 mark yesterday shot up to a near-uniform per-gallon average of $3.59 in this morning’s survey of Holland area stations, with some retailers selling for a penny or two less, but none more. This mark is 14 cents higher than last Friday at this time. Industry experts say that increased summer demand and refinery output adjustments were the biggest factors in this latest spike, and don’t believe that these costs will fluctuate too much in either direction until after Labor Day. While cynics cite the days of sub three-dollar fuel of years ago, this current mean is two dimes under what was seen at this time in 2011. Triple-A’s daily polling had marks of $3.38 nationally and $3.53 statewide; two cents more and two cents less, respectively, from a week ago.