For those of you who don't do it this is exactly how you establish the "push-rate" for each number and then translate that to the value of the number.
So, when you hear someone say "the 4 is only worth 4 cents" they are giving you the push-rate for that number. This is why, no matter the minor rule changes, the 3 and 7 will always be the most valuable numbers in football. With the limited nature of how scoring occurs, those numbers will alway have the highest push-rates and thusly hold he most value. This is why you should NEVER buy off or onto numbers like 9 and 12 because they are essentially "dead" and hold little value relative to their historical push-rates. When considering buying numbers in football, which some pros refuse to ever do, you must comparatively value the price you are being charged (10 cents, 20 cents, 30 cents?) vs the push rate for the number you are buying off of. 20 years ago you could buy on and off the 7 in the NFL for 10 cents. You can't do that any more because the value for the 7 went up and the bookmakers want to hold that value more so they charge you more to buy it from them.
Since the addition of the two point conversion in the NFL, these are the most valuable numbers in order:
3
7
6
14
10
1
5
2
4
8
Since the inception of the two point conversion the 6 and the 5 have gained the most value and the 4 has lost the most value.
When I buy points in football it usually as an "ease mechanism" for me. Which is sometimes counterintuitive mathematically but good for my heart!