How long to continue hormone therapy-Lupron shots.

In late 2011 I was diagnosed with prostate cancer, high PSA number and Gleason score. I decided on radiation treatment, started with hormone therapy, followed by 5 weeks of external beam radiation and just had seed implants. At first my Oncologist said the hormone trerapy could last 2 to 3 years, then perhaps 2 years and at my last meeting with him he suggested that 6 months to 2 years could be sufficient. I'm sure like everyone else, I would like to end the hormone therapy as soon as possible. Does anyone have a suggestion on where I could find some information on how long I need to stick with this part of the treatment? I would also appreciate comments or opinions from anyone that has gone thru this treatment.