Last time I saw my GP I asked whether she could look up my test results at diagnosis in 1995. I think they're quite interesting.
Free T4: 10.4
Thyroid mycrosomal antibody titre: 409,600 (<400 - GP notes that this was 'clearly massively increased')
Thyroid thyroglobulin titre: 25,600 (<400)
She also notes that 'at the time you were having some symptoms which it was not sure were attributable to hypothyroidism but you were started on thyroxine 50 mcg daily'. You don't say...