As a part of the judges' retirement system, there is hereby created a Judges' Retirement Fund which shall be made up of and into which shall be paid

1. (a) Percentage contributions from salaries of judges as provided in section four of this article;
2. (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;
3. (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;
4. (d) Interest on the investment of any part or parts of the fund;
5. (e) Any other moneys, available and not otherwise expended, which may be appropriated or transferred to the fund.