I’ve expressed my skepticism for the veracity of that site’s infographics twice before (most recently). It’s some guy’s financial advice grift project. Just because he mentions his “sources” doesn’t convince me.

I would say rents are even worse. In my country the cheapest ones are 35%-40% of my post-tax salary. And these are for the shitty apartments.

Something related to mortgages happened between 2005 and 2010, where the red line is above the green one, but I can't quite put my finger on it.

But whatever it was, it surely won't happen again!

I applaud the use of graphs to educate but this one is lacking forcing the reader to assume a lot.

• what is the vertical axis? I assume it's percentage change since some arbitrary time but the title text could mislead one to think it is "rate of change"
• year against which everything is measured is not stated. I assume it's 2000.
• are the figures inflation adjusted? If not, the graph could well be underplaying the situation.
• I assume (again) that "average" here is the arithmetic mean but medium would be a much better measure of typical incomes and mortgages repayments because it is more robust to outliers. In a country with big disparities in wealth, the income of billionairees will skew the average high.