Oil production increased last year in Kansas while natural gas production declined, newly released numbers show.

The numbers, which the Kansas Geological Survey released Monday, show that Kansas produced about 49.5 million barrels of oil last year, marking a 5.7 percent increase from 2013. Despite falling prices, last year’s oil production was at its highest level in Kansas since 1995.

However, the production and exploratory efforts related to oil and gas tailed off at the end of 2014 as prices dropped, according to KGS. The value of the oil produced dropped from $4.11 billion in 2013 to $4.09 billion in 2014.

The state’s top oil producer for 2014 was Ellis County, with about 3.4 million barrels, followed by Harper County, with 2.9 million barrels.

Harper and Sumner counties both saw a notable increase in production as drillers explored different areas of the Mississippian limestone play, which lies under south-central and southwest Kansas, KGS geologist Lynn Watney said in a news release.

The news release said most oil production in the Mississippian came from hydraulic fracturing, known as fracking. Rawlins, Logan and Scott counties, which are over the Pennsylvanian-Age Lansing-Kansas City geologic group, also saw a notable increase. Their wells are primarily vertical, unlike the horizontal fracking wells.

Meanwhile, natural gas production fell by 2.5 percent to about 287.6 billion cubic feet. With a one-year exception, production in Kansas has dropped every year since 1996. Stevens County was the largest natural gas producer, and most gas production was concentrated in southwest and south-central Kansas.