Mine on a meter, which I didn't want at the time went up to 110pm with two young adult kids home using loads, to 57 after my daughter had left, to 32pm at the moment before the rise, but I partly because I've overpaid for a while. Four bed four baths, just two of us now and I use water butts, for the grass and garden.
If any of your toilets are slightly leaking, Welsh Water will repair them for you, so please get that done, as you are paying for any water wasted in leaks if you have a meter.