State Election Round 1 (1959–1969)
Popular Vote vs Seats
How closely each coalition's seats match its popular vote — the Gallagher disproportionality index, the winner's bonus and the effective number of parties (ENP) over time.
Gallagher index5.82
Effective parties (votes)1.61
Effective parties (seats)1.75
Winner's bonus-5.8 ptsIndependent / no coalition
How to read this
- Independent / no coalition won 74.6% of the votes but 68.8% of the seats.
- Gallagher index 5.8: 0 means seats match votes exactly; above 10 indicates high disproportionality (common under first-past-the-post).
- The effective number of parties by votes is 1.6 — roughly how many serious contenders there really were.
Vote % vs seat % (%) State Election Round 1 (1959–1969) · Sarawak
Gallagher index Lower = more proportional
Effective number of parties (ENP) Laakso–Taagepera: 1 ÷ Σ(share²)
Votes & seats breakdown — State Election Round 1 (1959–1969)
| Coalition | Contested | Votes | % votes | Won | % seats | Gap (pts) | Vote % vs seat % |
|---|---|---|---|---|---|---|---|
| Independent / no coalition | 188 | 186,687 | 74.6% | 33 | 68.8% | -5.8 | |
| PERIKATAN Profile | 33 | 63,668 | 25.4% | 15 | 31.3% | +5.8 |
Indices for each election
| GE | Gallagher index | Effective parties (votes) | Effective parties (seats) | Winner's bonus |
|---|---|---|---|---|
| State Election Round 12 (2008–2021) | 27.86 | 2.17 | 1.16 | +31.4 |
| State Election Round 11 (2004–2016) | 22.76 | 2.07 | 1.27 | +25.6 |
| State Election Round 10 (1999–2011) | 21.16 | 2.09 | 1.55 | +22.1 |
| State Election Round 9 (1995–2006) | 24.41 | 1.87 | 1.28 | +24.4 |
| State Election Round 8 (1990–2001) | 25.61 | 1.70 | 1.07 | +25.6 |
| State Election Round 7 (1986–1996) | 25.32 | 1.80 | 1.17 | +25.3 |
| State Election Round 6 (1982–1991) | 24.75 | 1.88 | 1.28 | +24.7 |
| State Election Round 5 (1978–1987) | 3.09 | 1.98 | 1.95 | +3.1 |
| State Election Round 4 (1974–1983) | 16.28 | 1.99 | 1.88 | +16.3 |
| State Election Round 3 (1969–1979) | 33.02 | 1.91 | 1.13 | +33.0 |
| State Election Round 2 (1964–1974) | 7.08 | 1.98 | 1.88 | +7.1 |
| State Election Round 1 (1959–1969) | 5.82 | 1.61 | 1.75 | -5.8 |
Popular vote counts contested seats only; seats won unopposed count only as seats. "Independent / no coalition" includes non-aligned parties.