Category	1968	1972	1974	1979	1980	1984	1988	1993	1997	2000	2004	2006	2008	Total or Average
Seats in Commons	264	264	264	282	282	282	295	295	301	301	308	308	308	3754
Total Candidates	967	1117	1209	1424	1504	1449	1574	2155	1672	1808	1685	1634	1601	19799
No. of Candidates. Elected First Time	97	95	50	98	43	133	116	199	84	45	101	65	65	1191
Incumbents Not Seeking Re-election	41 of 259	49 of 261	18 of 262	38 of 262	10 of 262	36 of 267	44 of 277	66 of 285	40 of 291	22 of 301	54 of 297	28 of 306	33 of 304	479 of 3,634
Other Open Seats	5	3	2	20	20	15	18	10	10	0	11	2	4	120
Total Open Seats	46	52	20	58	30	51	62	76	50	22	65	30	37	599
Incumbents Seeking Re-election	218	212	244	224	272	231	233	220	252	279	243	278	271	3177
Incumbents Re-elected	161	165	207	176	229	139	168	91	212	253	201	240	240	2482
Incumbents Defeated	57	47	37	48	43	92	65	129	40	26	42	38	31	695
Challengers Elected	103	99	57	106	53	143	127	205	90	48	107	68	68	1274
No. of Parties Winning Seats	4	4	4	4	3	3	3	5	5	5	4	4	4	4
% of New MPs	36.7	36	18.9	34.8	15.2	47.2	39.3	67.5	27.9	15	32.8	21.1	21.1	0.317
% of Incumbents Not Seeking Re-election	15.8	18.8	6.9	14.5	3.8	13.5	15.9	23.2	13.7	7.3	18.2	9.2	10.9	0.132
% of Incumbents Elected	70.6	77.8	84.8	78.5	84.2	60.2	72.1	41.4	84.1	90.6	82.7	86.3	88.6	0.781
% of Challengers Elected	13.8	10.9	5.9	8.8	4.3	11.7	9.5	10.6	6.3	3.1	7.4	5	5.1	0.077
% of Challengers’ Wins Consisting of Beating an Incumbent	55.3	47.5	64.9	45.3	81.1	64.3	51.2	62.9	44.4	54.2	39.3	55.9	45.6	0.546
Ratio: Total Candidates to Seats	3.7	4.2	4.6	5	5.3	5.1	5.3	7.3	5.6	6	5.4	5.3	5.2	5.3

Source: ParlINFO website; Elections Canada, Official Voting Results, 1988, 1993; Online Official Voting Results, 1997 to 2008