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- 25 Development
- 18 Economic
- 14 Germination
- 13 Industrial
- 11 Nitrogen
- 10 Industries
- 10 Industry
- 10 Metabolism
- 7 Agricultural
- 7 Agriculture
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Year Completed
- 59 2010 - 2017
- 94 2000 - 2009
- 83 1990 - 1999
- 45 1980 - 1989
- 29 1970 - 1979
- 16 1960 - 1969
- 2 1956 - 1959