It’s not all-inclusive, but definitely interesting. There were many more takeaways from the researcher’s work including demographic trends and budgeting for tips; here are some that weren’t included in the chart that I found interesting about other professions:

• Apparently no one tips flight attendants, and if you do, you’ll probably receive free drinks thereafter.
• Golf caddies say that golfers tip better when they play better, but they always tip the best when it’s happening in front of clients.
• Tattoo artists expect $10-20 on a $100 job and $40-60 on a $400 job, but they get nothing from 30% of people.
• A massage therapist expects a $15-20 tip and receives one 95% of the time—about half of a massage therapist’s income is tips.
• A whitewater rafting guide said he always got the best tips after a raft flipped over or something happened where people felt in danger.
• Strippers not only usually receive no salary, they often receive a negative salary—i.e. they need to pay the club a fee in order to work there.