Explanation of Lexis Map for
Raw Population Counts

The charts below display the format for the original raw population counts. Each vertical line indicates that data are available for the year shown on the X-axis. Age is displayed along the Y-axis; hash marks indicate the age groupings for which data are available. For example, a hash mark at age 5 and another one at age 10 shows that population counts for that year are given for the 5 year age group 5-9. An arrow denotes an open age interval beginning at the indicated age. An upside down T indicates a closed age interval (e.g., population count for the maximum age attained).