Unelected PMs

I saw a graphic yesterday about how 12 out of 24 recent UK Prime Ministers became Prime Minister without winning a general election. They are:

1. Theresa May
2. Gordon Brown
3. John Major
4. Jim Callaghan
5. Alec Douglas-Home
6. Harold Macmillan
7. Anthony Eden’
8. Winston Churchill
9. Neville Chamberlain
10. Stanley Baldwin
11. David Lloyd George
12. HH Asquith
13. Arthur Balfour

I assumed their high proportion was because of their five year terms, but have a look at NZ PMs and who came in via an election and not.

Elected

1. Key
2. Clark
3. Bolger
4. Lange
5. Muldoon
6. Kirk
7. Nash
8. Holland
9. Savage

Replaced PM

1. Shipley
2. Moore
3. Palmer
4. Rowling
5. Marshall
6. Holyoake
7. Fraser

So fairly close. And in Australia:

Elected

1. Abbott
2. Rudd
3. Howard
4. Hawke
5. Whitlam

Replaced PM

1. Turnbull
2. Gillard
3. Keating
4. Fraser
5. McMahon
6. Gorton
7. McEwen
8. Holt
9. Menzies

So in Australia most PMs first became PM without an election.