Ecological zones | 2003–2004 | 2005–2006 | 2007–2008 | 2010 | 2012–2013 |
---|---|---|---|---|---|
Guinea savannah | 2.00 | 1.32 ± 0.36 | 2.34 ± 0.54 | 1.53 ± 0.18 | 1.91 |
Forest | 1.50 | 1.66 ± 0.05 | 2.10 ± 0.68 | 1.52 ± 0.17 | 1.59 |
Coastal savannah (1 site) | – | 2.03 | 1.44 | 1.31 | 1.13 |
Ghana (pooled) | 1.73 ± 0.35 (1.50–2.00) | 1.55 ± 0.32 (1.07–2.03) | 2.08 ± 0.62 (1.44–3.31) | 1.49 ± 0.16 (1.31–1.75) | 1.51 ± 0.39 (1.13–1.91) |