Reuters reports that between them the US and British markets account for 76 percent of Google’s revenues.

The numbers are: 62 percent from the US, and 14 percent from the UK.

We reported earlier that a fall-off in British year-end ad revenues was the chief reason for Google’s share slide last week.

Reuters comments: “This week, the report of a year-end fall-off in Google’s biggest external market, Britain, created a cascading effect that drove up its tax rate, smacked down profits and led the stock to plunge almost 20 percent, before partly rebounding.”