The 2020 Democratic presidential candidates are revealing how deep and broad their support is, just after the March 31 fundraising deadline that marked the end of the first quarter of 2019.

Bernie Sanders - $18.2 million

The campaign has raised $32 million in total, including the $14 million that the campaign started with. This solidifies Sanders' position as a frontrunner in the race.

Here's a closer look at the sources of Sanders' donations:

Around 900,000 individual donations

99.5 percent of donations to Sanders' campaign are $100 or less

Average donation is $20

88 percent of the money to the campaign came from donors who gave $200 or less

A majority of donors are 39 years old or younger

Almost 100,000 registered Independents and 20,000 Republicans have contributed

99.99 percent of donors can give again

99.6 percent of the money raised came online