NOTES TO CONSOLIDATED FINANCIAL STATEMENTS NOTE L — ADDITIONAL CASH FLOW INFORMATION NOTE M — SEGMENT INFORMATION 2001 2000 1999 Revenues from unrelated entities: United States electrical construction and facilities services $ 1,334,674 $ 1,350,716 $ 993,073 United States mechanical construction and facilities services 1,202,078 1,262,006 1,067,063 United States other services 209,721 163,936 82,814 Total United States operations 2,746,473 2,776,658 2,142,950 Canada construction and facilities services 198,221 236,961 196,694 United Kingdom construction and facilities services 463,560 446,251 553,654 Other international construction and facilities services 11,600 334 664 Total worldwide operations $ 3,419,854 $ 3,460,204 $ 2,893,962 Total revenues: United States electrical construction and facilities services $ 1,371,188 $ 1,373,977 $ 1,000,234 United States mechanical construction and facilities services 1,234,964 1,283,740 1,074,758 United States other services 215,458 166,759 83,411 Less intersegment revenues (75,137) (47,818) (15,453) Total United States operations 2,746,473 2,776,658 2,142,950 Canada construction and facilities services 198,221 236,961 196,694 United Kingdom construction and facilities services 463,560 446,251 553,654 Other international construction and facilities services 11,600 334 664 Total worldwide operations $ 3,419,854 $ 3,460,204 $ 2,893,962 Operating income (loss): United States electrical construction and facilities services $ 75,280 $ 58,644 $ 38,485 United States mechanical construction and facilities services 41,408 35,914 37,957 United States other services (7,163) (5,558) (4,532) Total United States operations 109,525 89,000 71,910 Canada construction and facilities services 2,312 5,160 3,991 United Kingdom construction and facilities services 7,170 6,026 3,208 Other international construction and facilities services (1,220) 551 (355) Corporate administration (29,105) (21,812) (20,663) Total worldwide operations 88,682 78,925 58,091 Other corporate items: Interest expense (4,795) (9,705) (10,520) Interest income 5,587 2,367 2,107 Income before taxes $ 89,474 $ 71,587 $ 49,678 The following presents information about industry segments and geographic areas for the years ended December 31, 2001, 2000 and 1999 (in thousands): EMCOR has the following reportable segments: United States electrical construction and facilities services, United States mechanical construction and facilities services, United States other services, Canada construction and facilities services, United Kingdom construction and facilities services and Other international construction and facilities services. The segments (i) United States other services primarily represents those operations which principally provide consulting and maintenance services and (ii) Other international construction and facilities services represents EMCOR’s operations outside of the United States, Canada, and the United Kingdom, primarily in South Africa, the Middle East and Europe, performing electrical construction, mechanical construction and facilities services. The following presents information about cash paid for interest and income taxes and non-cash financing activities for the years ended December 31, 2001, 2000 and 1999  (in thousands): 2001 2000 1999 Cash paid during  the year for: Interest $ 4,195 $ 8,290 $ 9,018 Income taxes $ 7,846 $ 4,039 $ 5,418 Non-cash  financing activities: 5.75% Convertible  Subordinated Notes  due 2005, converted  into common stock $ 115,000 $ — $ —