About 42 percent of the units fall into this category.
Using this benchmark, almost 30 percent of families fall short.
But he added that only about 5 percent of people with back pain fell into this category.
Last winter 90 percent of the people fell below the poverty line.
The euro rose 2.7 percent as the American stock market fell.
The company said attendance during the period fell 9 percent.
Since 1989, 13.5 percent of all reported cases fall in that age range.
More than 30 percent of all households fall into that category.
In 2001, only 8 percent fell short according to monitoring studies.
Roughly 20 percent of the nation's 104 million families fall into this category.