A line graph that shows the number of rolling 12 months in the United States from 2014 to 2015. The x-axis represents the years starting from 2014 and ending in 2015 with the y-axis representing the rolling quarter.
There are three lines in the graph each representing a different period of time. The first line is yellow the second line is green and the third line is orange. The lines are plotted in a horizontal axis with each line representing a month of the year. The yellow line represents the rolling time period while the green line represents a month in the month. The orange line represents an increase in rolling time with a slight decrease in the percentage of rolling hours. The graph also has a legend at the bottom that explains the meaning of each line. The title of the graph is "Rolling 12 Months" and it appears to be a summary of the data.
Description 
Type
Category
Source 1 of 2
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Date
2014
Collection
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Date
2014
Collection
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