If that is what you are doing , then I suggest you make an effort to get the best Odds available , because just backing those animals on the tote , will probably see you simply exercising your money after 12 months.

I don't actually have records , but I did record my top selection for 50 Races and it broke square , but would have won I'm sure using Betfair.

EDIT:
Here's the Summary

Selections 67
Winners 27
Outlay $67
Return $67.1
S/Rate 40.3%
POT 0.1%
Ave Odds $2.49