.1 million for the year ended december 31 , 2001 . service operations service operations revenues decreased from $ 82.8 million for the year ended december 31 , 2000 , to $ 80.5 million for the year ended december 31 , 2001 . the company experienced a decrease of $ 4.3 million in net general contractor revenues from third party jobs because of a decrease in the volume of construction in 2001 , compared to 2000 , as well as slightly lower profit margins