The fees have been the same since 1986. The law in 1986 set the minimum fee at $1.35 per AUM, and the fee for 2014 is still $1.35/AUM.
It takes an act of congress to raise the fee amount. They haven't.
From the BLM's website: "The Federal grazing fee, which applies to Federal lands in 16 Western states on public lands managed by the BLM and the U.S. Forest Service, is adjusted annually and is calculated by using a formula originally set by Congress in the Public Rangelands Improvement Act of 1978. Under this formula, as modified and extended by a presidential Executive Order issued in 1986, the grazing fee cannot fall below $1.35 per animal unit month (AUM); also, any fee increase or decrease cannot exceed 25 percent of the previous year’s level. (An AUM is the amount of forage needed to sustain one cow and her calf, one horse, or five sheep or goats for a month.) The grazing fee for 2014 is $1.35 per AUM, the same level as it was in 2013."
My comment = since it cannot fall below $1.35/AUM per the 1986 executive order, and the rate in 2014 is $1.35/AUM, I'm thinking there was no raising of fees in the interim. There may have been, but it's been at the floor of $1.35 for several years now.
1992 they were $1.92. Clinton’s incoming Sec. of the Interior Bruce Babbit and his new BLM head Jim Baca were proposing reforms that would raise fees closer to a “fair market” values $4.28. It sparked a backlash in 1993 that caused Babbit to throw Baca under the bus.
http://www.hcn.org/issues/6/165
I seem to remember them reaching a high of around $2.40 before going back down to the baseline.