Age (years)

Autumn

65 days, Mar to May

Winter

100 days, May to Sep

Spring

100 days, Sep to Dec

Summer

100 days, Dec to Mar

0.25-1.25

1.40

1.70

2.00

1.90

1.25-2.25

1.90

2.20

2.10

4.20

2.25-3.25

2.00

2.20

2.20

4.40

>3.25

2.10

2.00

2.20

4.40