Vitamin B12 Blood Levels Range and Test Results. Normal values of vitamin B12 in blood are between 200 to 900 picograms per milileter. Talk to your lab and request the specific values since every lab values ânormal rangeâ differently.However, these values arenât exactly correct because many people have been diagnosed with B12 deficiency even when their B12 levels were within the normal range.alk to your lab and request the specific values since every lab values ânormal rangeâ differently. However, these values arenât exactly correct because many people have been diagnosed with B12 deficiency even when their B12 levels were within the normal range.
The earliest settlers mined coal among the hills of south central Iowa. They used coal to heat their homes and cook their food in areas were timber was not available. Not until 1870 did the industry of coal mining begin to rapidly grow in Iowa. By that time the major Iowa railroads reached from the Mississippi River in the east to the Missouri River in the west. The railroads leased land in coal producing areas and operated mines which produced coal for the use of the railroads.
Which states produce the most coal? In 2016, about 728 million short tons of coal were produced in 25 states. Five states produced a total of about 509 million short tons, or about 70% of total U.S. coal production. The five largest coal-producing states with production in million short tons and their share of total U.S. coal production in 2016: Wyoming: 297.2 (41%) West Virginia: 79.8 (11%) Pennsylvania: 45.7 (6%) Illinois: 43.4 (6%) Kentucky: 42.9 (6%) Learn more: Coal Data Browser Annual Coal Report Quarterly Coal Report Energy Explained: Where Our Coal Comes From