This was 16.2 percent lower than the state average of 38 percent. In 2020 the total municipality population reached 520.
87.9 percent of the population had at least a high school diploma or the equivalent.
Degree distribution in Green for 2020*
| Degree | Number of people | Percentage of population | 
|---|---|---|
| No degree | 45 | 12.1 | 
| Regular high school diploma | 134 | 36.1 | 
| GED or alternative credential | 22 | 5.9 | 
| Some college, less than 1 year | 26 | 7 | 
| Some college, 1 or more years, no degree | 63 | 17 | 
| Associate's degree | 28 | 7.5 | 
| Bachelor's degree | 26 | 7 | 
| Master's degree | 19 | 5.1 | 
| Professional school degree | 3 | 0.8 | 
| Doctorate degree | 5 | 1.3 | 

 
               
                 
                 
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