What is mmvix?

What number in the numeral system does the Roman numeral MMVIX represent?

The supposed numeral MMVIX is not a Roman numeral at all as it doesn't follow the correct rule for writing Roman numerals. MM = 2000, V = 5, I = 1 and X = 10. The number might be intended to mean 2000 + (6 less than 10). This would equal 2004 and the correct Roman numeral for 2004 is MMIV I actually came Googling to find the answer to this question.I probably wrote it down to check out what it equates to in proper Dates. (May have been a Top Gear Episode).I would like to ask a bigger question.Why are all the wankers in the movie industry and TV, still using Roman Numerals ?