Place
- New Zealand22
- Pacific Grove (Calif.)22
- Albania21
- Albion River Watershed (Calif.)21
- Antarctica21
- Azerbaijan21
- Casco Bay (Me.)21
- Germany21
- India21
- Nantucket Sound (Mass.)21
- Niger21
- Northeastern States21
- Pakistan21
- San Benito County (Calif.)21
- Vineyard Sound (Mass.)21
- Asia20
- Burkina Faso20
- Ethiopia20
- Iran20
- Kings County (Calif.)20