I seem to recall it was about 60% loss of hearing at the time. Caused by an inner ear infection after a really bad cold at the time, and I had to take antibiotics for several years after that just so it wouldn't happen again, and to build up my immune system.
By the time I was 6 years old, my parents had me screened for hearing aids, and not long after, I was enjoying hearing again. The most difficult part of that was having to go to speech pathologists right at the school for 6 years to speak and hear clearly, and all that ended right around age 12.
So, I even know how to read lips in difficult situations as well.
I got a pair of digital hearing aids a couple years ago, and those really help, even in noisy environments like restaurants, and work much better than the analog hearing aids I had used for years. They have like 10,000 different adjustments that the doctor can make, but he only adjusted 6 of those settings. (volume and equalization).
A couple years ago, I had an MRI and CAT scan done to see if I was a candidate for a cochlear implant. They concluded the bone structure was such that I could get those implants, but my hearing is right below the threshold of being a candidate. My hearing specialist said generally those with 80% or higher hearing loss are candidates, and mine was something like 65% in the right ear, and 72% in the left ear.
So he put me on hearing aids for now, and has me come in for a hearing screening once a year. So the implants are more or less still an option.
Different implant centers have different criteria. UCLA and House Ear, about 30 minutes apart, had different criteria for what children they would implant. So if you really want the implant, contact Cochlear and ask them about centers in your area.