Generate a correctly punctuated version of the following text: A model of the mass balance that includes data even before the satelliteera shows that since 1840 precipitation in the form of snow has risen by 1220 the amount of melt water runoff has increased by approximately 60 and the output from glaciers has risen by approximately 40
A model of the mass balance that includes data even before the satellite-era shows that since 1840, precipitation (in the form of snow) has risen by 12-20 %, the amount of melt water runoff has increased by approximately 60 %, and the output from glaciers has risen by approximately 40 %.