Table 1 Number of participants per survey wave by sex and age

N

8,347¹

7,678¹

7,890¹

7,547¹

female

male

female

male

female

male

female

male

3-year olds

1,078

1,010

985

1,002

965

1,001

898

851

4-year olds

1,178

1,206

1,116

1,168

1,137

1,136

1,069

1,092

5-year olds

1,288

1,355

1,124

1,213

1,186

1,266

1,163

1,216

6-year olds

579

653

521

849

592

607

605

653

Total

4,123

4,224

3,746

3,932

3,880

4,010

3,735

3,812