I'm at 25 heifers and 20 bulls.
Sold a 12 year 2 month old cow earlier this month. She missed her scheduled calf last May but earned a pass because she had 10 calves between December 1999 and May 2008 (no twins and was 4th generation of a roan bottle calf Dad bought me when I was 9). Ended up still open in February so the axe fell... Anyway, 10 calves in 9 years and all heifers. I kept 4 for of them for cows, wish I'd have kept more. Her offspring are making good mothers.
She was the 11th of 13 from another cow that came up missing just before her 14th was scheduled to appear. The cow was 15 at the time. Never did find her. Her tally was 10 bulls 3 heifers. Kept one other daughter from her, she just turned 11 and just had her 10th calf. Her tally is 6 bulls 4 heifers.

sorry for running on, but if you are lucky, every now and then you run across a few really good cows.