Another equally valid hypothesis would be that people have better information and thus to fight these more, and also these get noticed more than before. It is a

Another equally valid hypothesis would be that people have better information and thus to fight these more, and also these get noticed more than before. It is also possible that the absolute number of such cases have gone up despite the rate per capita has gone down, given the population growth. Unless someone does a careful analysis, we just can't determine the frequency based on anecdotal evidence.