Generally, new, young layers will lay really well through that first year, including winter (if they were spring chicks). That 2nd fall/winter they will ease up a little as they come into their first "real" molt, at least in my experience. Molting means all that protein that was going into eggs now must be put toward growing out a lot of new feathers as quickly as possible, and egg production generally stops or slows way down for a month or so (that first molt - longer the older they get). Then factor in the short days, and the use of energy to stay warm...
Plus of course it depends on breed...
My four oldest will be four this year (orp/barred rock/aust/wyan), and they've been giving me 3-4 eggs each this winter. However, they stopped laying for a solid two months when they molted this past fall. I expect as the days grow warmer and longer, they'll probably lay 4-5 eggs a week each.
I don't supplement light, but do have lots of windows, so they're able to take advantage of as much natural light as possible.