Group	Species
never	22
never	18
never	22
never	20
never	15
never	21
never	13
never	13
never	19
never	13
never	19
never	15
1year	11
1year	11
1year	14
1year	7
1year	18
1year	15
1year	15
1year	12
1year	13
1year	2
1year	15
1year	8
8years	17
8years	4
8years	18
8years	14
8years	18
8years	15
8years	15
8years	10
8years	12