th .nooit{
	background-image: url(../images/nooit.png);
	height:91px;
	width:22px;
}

th .soms {
	background-image: url(../images/soms.png);
	height:91px;
	width:22px;
}

th .regelmatig {
	background-image: url(../images/regelmatig.png);
	height:91px;
	width:22px;
}

th .vaak {
	background-image: url(../images/vaak.png);
	height:91px;
	width:22px;
}