(a) Percentage contributions from salaries of judges as provided in section four of this article;
(b) Gifts and bequests to the fund and any accretions and accumulations which may properly be paid into and become a part of the fund;
(c) Specific appropriations to the fund made by the Legislature of the state of West Virginia and by any county court or courts of the state;
(d) Interest on the investment of any part or parts of the fund;
(e) Any other moneys, available and not otherwise expended, which may be appropriated or transferred to the fund.