I have been receiving LTD payments for 3 yrs. I have a permanent disability. Since I am 51, my monthly payments would amount to over $94K by the time I reach 65. My insurance company has offered me a little over $36K to settle now. This seems too low to me. What is the standard percentage I should expect? They tried to lead me to believe that this was a standard settlement offer and was not negotiable. Please advise.