They account for $99\mathrm{.}9$ percent of all employer firms.

They pay about $40$ percent of total U$.$S$.$ payroll.

They comprise $97\mathrm{.}5$ percent of all exporters.

They employ $99\mathrm{.}9$ percent of all private$-$sector workers.

They generated about $65$ percent of net new jobs over the last two decades.