Population | Year I (1976–1986) |  |  | Year II (1987–1996) |  |  | Year III (1997–2006) |  |  | Year IV (2007–2017) |  |  |
---|---|---|---|---|---|---|---|---|---|---|---|---|
N | PPL | He | N | PPL | He | N | PPL | He | N | PPL | He | |
Oromia | 128 | 0.983 | 0.637a | 37 | 0.973 | 0.611a | 12 | 0.974 | 0.598 | 11 | 0.966 | 0.603 |
Amhara | 45 | 0.987 | 0.589bc | 14 | 0.967 | 0.577b | 26 | 0.951 | 0.573 | 3 | 0.951 | 0.592 |
SNNP | 24 | 0.892 | 0.547d | 12 | 0.832 | 0.539c | – | – | – | 6 | 0.901 | 0.563 |
Tigray | 12 | 0.952 | 0.603b | 34 | 0.977 | 0.598ab | 9 | 0.879 | 0.561 | 2 | 0.955 | 0.595 |
B/Gumuz | 9 | 0.938 | 0.505c | – | – | – | – | – |  | – | – | – |
Mean |  | 0.945 | 0.576 | – | 0.937 | 0.581 | – | 0.935 | 0.577 | – | 0.943 | 0.588 |