Use the following corn futures quotes:

Corn $5,000$ bushels

Contract Month Open High Low Settle Change Open Interest

March $455\mathrm{.}125457\mathrm{.}000451\mathrm{.}750452\mathrm{.}0002\mathrm{.}750597,913$

May $467\mathrm{.}000468\mathrm{.}000463\mathrm{.}000463\mathrm{.}2502\mathrm{.}750137,547$

July $477\mathrm{.}000477\mathrm{.}500472\mathrm{.}500473\mathrm{.}0002\mathrm{.}000153,164$

September $475\mathrm{.}000475\mathrm{.}500471\mathrm{.}750472\mathrm{.}2502\mathrm{.}00029,258$

How many of the May contracts are currently open?