This is just my second year making maple syrup. I tried it last year just to see if I could do it. I ended up with about 2 pints of syrup (which was my goal), and my ratio of sap to syrup was about 33:1. This year, I decided to collect 10 gallons of sap, and ended up with 3.75 pints. That's a ratio of 21.3:1. I told a coworker (who used to peoduce maple syrup commercially) and he lent me his sap hydrometer. The sugar content was 3.9%. I'm not sure if the sugar content remains constant during the season or if it changes, but what I measured was sap collected 4 days after my initial 10 gallons. My single sugar maple is in the midsle of my yard and gets full sun from about noon until 5, and I'm sure that makes a difference. I am curious to know what others have found this year regarding sugar content of sap and sap:syrup ratios.