What do you all think about these statistics for allowances?

My 12 year old uses about $10 a week on average for activities on the weekends. The two younger don’t use much of anything except infrequently. I used to give allowance once a month. It was based on age. They got double their age per month. So the 7 year old got $14 a month, but it was split into three categories. Give, Save, and Spend. I’ve fallen off the wagon giving them their allowances and want to start again. I’d like to hear what other parents have been doing to teach their kids about money, saving, finanaces, investing, checking accounts, etc….
How Much To Give?
Kids’ Money
This ongoing survey yields the following average weekly allowance amounts for each age and gender indicated:

Age – All – Boys – Girls

3 – 3.20 – 3.03 – 3.38

4 – 2.85 – 2.48 – 3.29

5 – 3.15 – 3.03 – 3.27

6 – 3.85 – 3.32 – 3.99

7 – 4.10 – 4.12 – 4.07

8 – 4.32 – 4.45 – 4.12

9 – 5.52 – 5.33 – 5.71

10 – 7.18 – 6.56 – 7.83

11 – 7.92 – 6.80 – 9.07

12 – 9.58 – 9.38 – 9.85

13 – 9.52 – 9.95 – 9.10

14 – 13.47 – 13.50 – 13.51

15 – 15.57 – 16.65 – 14.38

16 – 17.84 – 15.79 – 19.62

17 – 30.66 – 27.65 – 35.61

18 – 40.10 – 70.57 – 24.86