Why are there no links for the last century and the last millennium?
To complicate the picture beyond belief, less than 40% of the population can understand, much less solve problems involving interrelated percentages.
e.g. : After Obama became president, useful non-government employment dropped by 50%.
Two years after, he preened about having increased employment in the previous 2 years by 60% !
Most of his electorate wildly celebrated the fantastic achievement!
Question... is the country better off now than before he was elected?
You can take that up directly with ReligionOfPeace.com, for them only going back to 2001.
For more links going back to the last millennium, history sources like Wikipedia is a good start.