Car key keeps getting stuck in ignition switch

About 5 months ago when trying to remove the car key out of the ignition switch of my Honda Civic 2001 with automatic transmission, the key keeps getting stuck in the ignition albeit sporadically. However in the last 2 months it's happening more frequently and it's really becoming anoying. Each time it happens I just have turn the key back to "on", press the brake and move the speed shift lever from "P" to "R" and back.
I would really appreciate any suggestion regarding this matter.