CONCORD, N.H. (AP) — New Hampshire has recorded nearly 230 drug overdose deaths this year, with the majority of them linked to the powerful synthetic opioid fentanyl.

The Attorney General's office said this week that there were 226 overdose deaths through July, putting it on track to have fewer than the 485 deaths recorded last year. The number, however, is expected to be higher than the 439 recorded in 2015 and more than double the number of deaths in 2011.

Of the 226 overdose deaths this year, 158 of them were either from fentanyl or a combination of fentanyl and other drugs. There were also 11 deaths from carfentanil, which is 100 times more powerful than fentanyl and used to tranquilize elephants.

New Hampshire has one of the highest drug overdose rates nationally.