[EGPWS]

A considerable spike since 2009.

I wonder what the driving force behind that is?

[kabar]

We are a nation of 315 million. These numbers, less than 2,000 a year are statistically meaningless. The numbers are infinitesimal.

[Hotlanta Mike]

I wonder what the driving force behind that is?

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I suspect it has to do with double taxation on income.

When I was working in Switzerland in the 80’s I had to still file with the IRS every year and report foreign earned income. At that time I believe anything over $75,000 per year was taxed again by the US federal government.