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| Year | Name | Attendees | Institutions |
| 1977 | The Ecosystems Center 1977 | 20 | 2 |
| 1978 | The Ecosystems Center 1978 | 37 | 2 |
| 1979 | The Ecosystems Center 1979 | 59 | 6 |
| 1980 | The Ecosystems Center 1980 | 57 | 5 |
| 1981 | The Ecosystems Center 1981 | 60 | 6 |
| 1982 | The Ecosystems Center 1982 | 54 | 5 |
| 1983 | The Ecosystems Center 1983 | 41 | 3 |
| 131 unique attendees in 7 courses during the period 1977 to 1983. | |||