my son just turned 2 years old now. Only 11-16oz a day depending how many times of pumping and if I am period or not. I pumped 4-5 times at weekdays as I can pump 3 times at work. On holidays, only 2-3 times as I have to take care of the 2 kids myself, so no spare time to pump. Usually milk production dropped during holidays.
The "pumping road" is not easy but I am proud of myself and my son.