40,000 unique visitors in April

One reason for my traffic
via WikipediaTraffic to the China Herald has been pretty stable over the past year, but this month I can report a small new record: for the first time over 40,000 unique internet users have been visiting this weblog.
Telling exactly where the traffic is coming from is pretty hard. Last year, at the beginning of the year, I noted in a few months time an unprecedented spike in my figures. My estimation at the time was that my hit rate at the search engines had become better, most likely because of changes at the search engines.
Since then the trend has been upward, apart from the Spring festival month February, but not in a very remarkable speed. What has been curious is that whatever I do or not do, traffic remains on the same level. Last month I have been traveling heavily and could not post too much on the China Herald. Traffic remained the same. In de past week I have been able to catch up: it does not mean that many more people find their way to this place.
I guess that the search engines largely define the number of visitors. There are a few stories from 2006 and 2007 that attract every month a huge number of visitors, while I do not really see a good reason for that.
Anyway, thanks for passing by, and when you have time, please tell me why you are here.