I'd been feeling that money was getting tight, and more than what seemed reasonable from just the general price inflation recently. So I checked our joint salary income and compared it to what the Retail Price Index (cost of standard goods) has been doing.
The falling income (dark blue line) isn't a surprise, as I've had a pay freeze for a while, and Martha's mostly doing voluntary work or study. But it's interesting (and not a bit depressing) to see how the growing RPI noticeably diminishes our effective income (red line). That's a drop of about 30% since we got married.
[Note to mathematicians: each line is relative to the others, as the units for each are different.]