Excluding the gain from the 1989 period, first half 1990 earnings declined 29 percent.
Less than 10 percent declined to be interviewed, she said, and others were initially nervous.
About 5 percent of Washington's 80,000 teachers have declined to join the union.
Three percent of respondents answered "no religion" on the survey, and 6% declined to answer.
She said fewer than 12 percent of the charities decline to provide the information requested.
About 20 percent of France's mosques declined to take part.
For example, 54 percent of those who saw the debate on television called it a draw or declined to name a winner.
In addition, about 20 percent of the women declined to participate.
Only 10 percent of the fathers who remained married declined to pay.
About 7% percent of the White British declined to state any religion.