In case you were wondering, the plural term for Prius is "Prii." You might want to remember that, because according to Toyota, the car is multiplying fast.
Its supply may be limited in parts by last month's Japanese earthquake and tsunami, but that hasn't stopped it from setting sales records, the most recent one being one million sold in the U.S.
In the past six months, Toyota said the Prius has seen three all-time milestones reached. Six months ago its global sales topped two million units, and by October, worldwide sales crossed the three-million mark.
"Since the Prius went on sale [in the U.S.] 11 years ago not a year has gone by when it hasn't been the number one selling hybrid vehicle in the U.S.," said Bob Carter, Toyota Division group vice president and general manager. "Prius has become synonymous with the word 'hybrid' and as we see fuel prices starting to rise again, it has accounted for more than 60 percent of hybrid passenger car sales so far this year. "
More: Toyota Prius US Sales Top 1 Million Cars on AutoGuide.com