As of 1991, the National Electrical Codes (NEC) has required GFI protection in all wet places of the home. These areas include basements, crawlspaces, baths, exterior, garages, kitchen, pools and spas. These requirements have been phased in since 1971.
Although these may have been required by NEC at the time your house was built, local or municipal codes departments did not enforce this.
The above video shows some of the goofy electrical items often found in inspections as well as helpful information about monthly testing of these devices.
The Complete Home Inspections Team