You have 1.5 inch tires which is 38 mm so you would want to use the 37 mm line since it is the closest to your tire width. You could interpolate between other lines but that would be more work than necessary since these are guidelines more than dictates. Your loaded bike weight is 85 kg, these pressure charts are per tire though. Ideally you would weigh your front and back wheel separately with you on the loaded bike to get the actual weights on the tires. Again this might be a little obsessive compulsive so you could just use the 40% front, 60% rear figures from the article for a typical racing bike since it seems to be in the middle of the extremes of the examples given in the article. That would mean that you have 34 kg on the front and 51 kg on the rear. According to the 37 mm line you would want to start with 33 psi in the front and 50 psi in the rear. Since Schwalbe wants 45 psi minimum you would probably want to run 45 front and 50 rear. If that seems too soft you can increase it some and if you end up thinking 60/65 is best there is no harm in that. The idea is not so much that these charts are the perfect pressures for all people, tires, and conditions as it is that you should try lower pressures than the max printed on the sidewalls, especially if you have tires wider than 25 mm or so. You can get very nearly the same performance with a better ride at lower pressures and wide tires do not need max rated pressures to carry most riders.

Ken