Serial number range: 2822351-3991868 (1977-2005, approx. 95,023 produced). Production by year: 1977: #2822351-2826350 (4,000 units); 1978: #2909101-2926900 (9,000 units); 1979: #2985101-2987100 (2,000 units); 1980: #3019751-3084000 (5,000 units); 1981: #3098501-3101500 (3,000 units); ... ; 2000: #3883747-3909625 (4,160 units); 2001: #3914423-3932013 (3,000 units); 2002: #3933014-3959160 (4,000 units); 2004: #3983234-3984533 (1,300 units); 2005: #3987244-3991868 (1,000 units)