According to C.I.Eau (Water Information Centre), leaks account for 15 to 20% of the quantities of water that are consumed by French households, as an average.
drop by drop
4 liters per hour
that is m³ per year
a thin trickle of water
16 liters per hour
a trickle of water
70 liters per hour
a leaking toilet flush
25 liters per hour
Round the answers to the nearest whole number.