Fraction of a percentage point of all terror attacks.
It is very rare that price tag actions lead to arrests.
From a wiki page.
Since then, the frequency of "price tag" attacks had spiked and ebbed. The Anti-Defamation League has tracked dozens. Friday's fire was at least the fourth "price tag" fire this year, the group said, a list that included the torching of two Palestinian vehicles, the vandalizing and burning of a Greek Orthodox Seminary, and a mosque that was set on fire and vandalized. Anti-Arab graffiti was scrawled on a school in a separate incident in June but no fire was set, the ADL said.