(AP) — Oil production grew again last year in southwest Nebraska thanks to new techniques, but state officials don’t expect the boom to last long.

The Nebraska Oil and Gas Commission estimates that 2.8 million barrels of oil were produced in the state last year, but final numbers aren’t yet available.

Commission Director Bill Sydow says that’s better than the 2.5 million barrels produced in 2012, and it would the best year since 2001.

But Sydow says he expects many of the new oil fields in Hitchcock and Dundy counties will dry up by the end of 2014.

And even with the increases, Nebraska’s oil production remains relatively small compared to other oil-producing states.