| Year | No. animals | Reference |
| 1970 | 94,075 | Bell et al., 1973 | 1971 | 93,215 | Bell et al., 1973 | 1972 | 93,158 | Bell et al., 1973 | 1973 | 109,612 | Osborne et al., 1975 | 1975 | 80,774 | Osborne et al., 1975 | 1981 | 45,867 | Howard et al., 1983 | 1983 | 41,155 | Howard et al., 1983 | 1987 | 50,715 | Howard et al., 1987 | 1988 | 65,018 | Howard et al., 1988 | 1989 | 47,145 | Jeffrey et al., 1991 | 1990 | 44,538 | Jeffrey et al., 1991 | 1991 | 68,872 | Jeffrey et al., 1991 | 1993 | 64,940 | Kapungwe, 1993 | 1994 | 50,000 | Jeffrey, 1994 | 1999 | 45,000 | Kampamba et al., 1999 | 2001 | 42,119 | Kamweneshe et al., 2002 | 2005 | 38,000 | Chansa and Kapamba, 2010 |
|
|