To put it briefly: quite a bit of “fluctuation” with no clear trend. Interestingly, between 2005 and 2015 there was a slight upward “spike”: apparently by chance, there was a…
To put it briefly: quite a bit of “fluctuation” with no clear trend. Interestingly, between 2005 and 2015 there was a slight upward “spike”: apparently by chance, there was a…