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Table V. Proportionality Index
| Region | Year of Election | |||||||||
|
Country |
1990 |
1991 |
1992 |
1993 |
1994 |
1995 |
1996 |
Mean |
||
| Central | ||||||||||
|
Poland |
86.96 |
62.48 |
74.72 |
|||||||
|
Czech Republic |
81.1 |
80.89 |
94.4 |
85.46 |
||||||
|
Hungary |
99.98 |
78.85 |
89.42 |
|||||||
|
Slovak Republic |
92.3 |
76.2 |
87.04 |
85.18 |
||||||
| Balkans | ||||||||||
|
Albania |
94.18 |
73.06 |
83.62 |
|||||||
|
Bulgaria |
75.05 |
87.96 |
81.51 |
|||||||
|
Croatia |
87.14 |
87.14 |
||||||||
|
Romania |
89.37 |
83.79 |
89.83 |
87.66 |
||||||
|
Slovenia |
95.45 |
94.33 |
94.89 |
|||||||
| Baltic States | ||||||||||
|
Estonia |
82.4 |
87.16 |
84.78 |
|||||||
|
Latvia |
89.25 |
86.59 |
87.92 |
|||||||
|
Lithuania |
89.74 |
79.82 |
84.78 |
|||||||
|
Mean |
90.69 |
81.01 |
86.09 |
75.87 |
84.62 |
86.96 |
86.29 |
|||
The Proportionality Index is calculated by subtracting each party's percentage of seats in the chamber from the percentage of the vote won. These difference are summed over all parties, divided by 2 and subtracted from 100.
Source for Proportionality Index:
Rose, Richard. 1983. "Elections and Electoral Systems: Choices and Alternatives". In V. Bogdanor and D. Butler, eds., Democracy and Elections. Cambridge : Cambridge University Press.