What age did you move your child from a cot to a bed?

My daughter's 1 so not planning on putting her in a bed just yet, but just wondering what age you did as I have no idea when's best or what behaviours the child should be exhibiting when you do. She's sleeps straight through from 7:30pm till 8:00 (sometimes 10:00am). She doesn't tend to move alot in her sleep, she falls asleep on her tummy as stays there, only wriggling from side to side not up and down the cot, unless she wakes up and moves