11.   The committee attributes the bounty to anger over the presidential election and to vigorous fund-raising efforts.

12.   The decline was attributed to the relatively high cost of American colleges and universities and to vigorous recruiting efforts in recent years by colleges in other countries.

13.   The increased value, they say, would stimulate more vigorous recycling efforts.

14.   The higher prices spurred more vigorous recycling efforts.

15.   The plans call for more vigorous efforts to keep undocumented immigrants from entering the United States and for removing those that break the law.

16.   The proposal failed despite vigorous efforts of senators from northeastern states.

17.   The victims had apparently set up the encampment despite vigorous efforts to keep them out.

18.   This lack of historical analysis disappointed many Jewish leaders, who generally give Pope John Paul II warm praise for his vigorous efforts to improve Catholic-Jewish relations.

19.   He instituted stringent cost controls and vigorous marketing efforts aimed at conventioneers.

20.   He urged vigorous diplomatic efforts and more cultural exchanges to improve understanding of the United States and counter anti-Western propaganda.