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.
Carbon Dioxide (CO2) retention is something that can occur in people with moderate to severe COPD. Normal arterial CO2 range is from 35-45 mmHg. CO2 becomes an acid in the blood, and can cause the bloods pH to change when the levels of CO2 change. As we know, COPD is usually a slowly progressing lung disease. When lung function declines over time, this normal range of CO2 may rise.