One likely reason for their growth is rising oil prices, which have quadrupled since 2002.
Since 1990, the state's Hispanic population has increased eight-fold, while the Asian-American population has quadrupled.
Phone taps, as it happens, more than quadrupled between 2001 and 2008.
The number of deaths from these drugs has quadrupled over the last ten years.
While the population has doubled since Sadat died, the number of prisons has quadrupled.
Not even munition-makers will, if it's true that the income-tax is going to be quadrupled next year.
In 1862 there were but 10,850 reaping-machines in France, but their number is now more than quadrupled.
Whatever strictures may be laid upon careless readers in general may perhaps be quadrupled when applied to bad reading of novels.
The new agent has more than quadrupled the area from which London draws its meat.
Let them be brought within half the distance, and then attractions and repulsions will both be quadrupled.
late 14c., from Middle French quadrupler, from Late Latin quadruplare "make fourfold, multiply by four," from Latin quadruplus (adj.) "quadruple, fourfold" (see quadruple (adj.)).