The right of trial by jury shall remain inviolate, and shall extend to all cases at law, without regard to the amount in controversy; but a jury trial may be waived by the parties in all cases in the manner prescribed by law; and in all jury trials in civil cases, where as many as nine of the jurors agree upon a verdict, the verdict so agreed upon shall be returned as the verdict of such jury, provided, however, that where a verdict is returned by less than twelve jurors all the jurors consenting to such verdict shall sign the same.

[As amended by Const. Amend. 16.]