According to Microsoft, there are…

21,081 Microsoft Certified Technology Specialist (MCTS)
2,293 Microsoft Certified IT Professional (MCITP)
1,433 Microsoft Certified Professional Developer (MCPD)
68,668 Microsoft Certified Systems Engineer on Windows 2003 (MCSE)
105,178 Microsoft Certified Systems Administrator on Windows 2003 (MCSA)
286,736 Microsoft Certified Systems Engineer on Windows 2000 (MCSE)
144,068 Microsoft Certified Systems Administrator on Windows 2000 (MCSA)
26,597 Microsoft Certified Desktop Technician on Windows XP (MCDST)
145,063 Microsoft Certified Database Administrator on SQL Server 2000 (MCDBA)
28,535 Microsoft .NET Microsoft Certified Solution Developer (MCSD)
65,583 Microsoft Certified Application Developer on Microsoft .NET (MCAD)