Treatment type	EU 12	EU 15
Secondary treatment	0.627394872	0.370289302
Secondary+other treatment		0.391945473
N removal	0.453669713	0.428568981
N removal+other treatment		0.606019241
P removal		0.217858357
P removal+other treatment		0.433087935
NP removal	0.204364011	0.139388487
NP removal+other treatment	0.228199936	0.295086219