I managed to have a look at the current trend (using Google Trends) for data mining by country (search volume), city (traffic source) and language (search language). Although I am no surprise that most of the interest came from Indian people, what interest me is that Iranian also want to join the data mining community year by year!
So have a look: Data Mining Trend (2004-2010)
|Country||Ranking (Search Volume)|
|City||Ranking (Traffic Volume)|
|Hong Kong (Hong Kong)||7|
|Language||Ranking (Search Language)|