Ethnic/Caste | 1959 | 1978 | 1981 | 19911991 | Both A. Hill Group | 78.00 | 85.00 | 79.50 | 79.00 | 85.00 | 80.4 |
| Brahman | 27.5 | 36.2 | 36.6 | 18.5 | 15 | 37.4 |
| Chhetri | 31.2 | 36.2 | 36.6 | 18.5 | 15.0 | 17.7 |
| Newar | 3.7 | 7.9 | 8.0 | 6.8 | 13.3 | 15.8 |
| Tribal | 15.6 | 18.9 | 22.3 | 16.6 | 13.3 | 15.8 |
| Occupational | 0 | 0.8 | 0 | 0.5 | 3.3 | 1.1 |
| B.Tarai Group | 22.00 | 15.00 | 20.5 | 21.0 | 15.0 | 19.6 |
| Brahman | 3.5 | 2.3 | 0 | 2.4 | 1.6 | 2.3 |
| Landded caste | 10.1 | 7.0 | 7.1 | 5.4 | 5.0 | 5.3 |
| Trade caste | 2.8 | 1.6 | 1.8 | 2.4 | 1.7 | 2.3 |
| Total | 100 | 100 | 100 | 100 | 100 | 100 |
| No of Seats | 109 | 127 | 112 | 205 | 60 | 265 |
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Source: Harka Gurung, Asian Survey, Vol.XXII, No.3, March 1982, P.313 and Himal, May/June 1992.