{"10":"Symptoms wax and wane but are generally controlled by continuous medication.","20":"Nearly constant and restricts routine daily activities by less than 25% of pre-illness level; or periods of incapacitation of at least 2 but less than 4 weeks total duration per year.","40":"Nearly constant and restricts routine daily activities to 50-75% of pre-illness level; or periods of incapacitation of at least 4 but less than 6 weeks per year.","60":"Nearly constant and restricts routine daily activities to less than 50% of pre-illness level; or periods of incapacitation of at least 6 weeks per year.","100":"Nearly constant and so severe as to restrict daily activities almost completely; or require rest therapy nearly continuously."}