Zones

January to April

May to June

July

August to September

October

November

December

Extreme North (EN)

1

0.9

0.9

0.9

0.9

0.9

1

North (N)

1

1+10% EN

0.9

0.9

0.9

1+10%EN

1

1+10%EN

1+10%EN

Centre

1

1

+10%N

1

+10%N

1

1

1+10%EN

South

1

1

1

+10%N

1

1

1