The maximum length of time you can claim unemployment benefits is 26 weeks. If the unemployment rate is 5% or lower, you can claim benefits for up to 12 weeks. For every .5% increase in the unemployment rate above 5%, a week is added to the duration of benefits.
1 Non-smokers living away from urban areas have normal carbon monoxide levels in the blood stream of 0.4% to 1.0%.  Carbon monoxide levels of 1% to 5% may be considered normal if a person lives in a busy urban or industrial setting.
The safe limit of carbon monoxide is approximately 35 to 50 parts per million. For carbon dioxide, the safe limit is approximately 5,000 parts per million. Fatal poisoning by carbon monoxide is relatively common, whereas poisoning by carbon dioxide is rare.