In fact, the only number that seems to have fallen over those years is the OECD Americas average, something I’m sure is a result of including Mexico’s zero (ie, not available, not no government) in 1975’s average.
is almost right, it’s because Mexico isn’t included, and so the 1975 figure is a simple average of Canada & US, ie halfway between then. In fact the regional averages, being unweighted, are a little suscept – the US is about 90% of the N.Americas, isn’t it?
Minor point but
In fact, the only number that seems to have fallen over those years is the OECD Americas average, something I’m sure is a result of including Mexico’s zero (ie, not available, not no government) in 1975’s average.
is almost right, it’s because Mexico isn’t included, and so the 1975 figure is a simple average of Canada & US, ie halfway between then. In fact the regional averages, being unweighted, are a little suscept – the US is about 90% of the N.Americas, isn’t it?