But the decline occurred at a slower rate than in May.
The decline occurred in 2003, the latest year for which figures are available.
A rapid decline in physical activity has occurred between the 1980s and the 2000s.
The study did little to explain why the decline has occurred or where students who might have considered law school are going instead.
However, this late decline occurred from a very low initial level.
The first major decline in the census growth rate occurred between 1975 to 1980.
Officials said yesterday that the decline had occurred mainly among high school students.
Such a decline would not have occurred if marijuana had been legal.
The firm later reported that the 24-million-gallon decline had occurred on March 30.
The decline occurred during a rise in the overall market.