Winning percentage

[slickmick]

Here is an interesting one.

What are the overall winning percentages of all sanfl teams?

Im thinkin of the competition in the last 20 years since the eagles merger or overall from 1877(could be tough) to present

[spell_check]

I can do it from 1897 to end of last season:
Central: 52.48
Eagles: 61.31
Glenelg: 43.78
North: 51.41
Norwood: 56.94
Port: 67.65
South: 36.63
Sturt: 49.82
West: 43.54
Torrens: 44.86
Woodville: 27.83