It normally refers to the number of coins of a specific denomination struck in a given year. In the U.S. mintage figures are typically broken down further by the mint or mints that struck them.
mintage
To date, the year with the highest mintage was 2000, with a combined mintage of over 14 billion.
The US Mint did not issue a space shuttle commemorative in 1988.
The lowest mintage occurred for the 2008-D Oklahoma Quarter with 194,600,000 This does not include the DC. or Territories quarters
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The 1926 double eagle mintage is 816,750 for Philadelphia/ Denver 481,000/ San Francisco 2,041,500
If you are asking about the series of Liberty Head nickels from 1883 to 1912? The 1912-S issue has the lowest mintage at 238,000.
The 1871 Indian Head Cent, with a mintage of 3,929,500, is considered a key date because there are only 3 other cents with lower mintages in the series. The famous 1877 cent with a mintage of 852,500, the 1908-S cent with a mintage of 1,115,000 and the 1909-S cent with a mintage of 309,000 are all considered key dates of the Indian Head Cents.
Mintage data for U.S. silver quarters produced from 1796 to 1963 shows a mintage of 3,138,259,970 coins. The mintage data for 1964 is 1,264,526,113 coins this would bring the total to 4,402,786,083 silver U.S. quarters.
The mint mark is part of the criteria that determines a coins value along with the date, mintage, grade and condition of the coin
The most common would be the 1922-P with a mintage of 51,737,000 coins. The second most common would be the 1922-S with a mintage of 17,475,000 coins. The least common would be the 1922-D with a a mintage of 15,063,000 coins.
Mintage is the number of coins that were struck, a mintamrk identifies were the coin was made. 1964 is the highest mintage and last year of all 90% silver Washington quarters, and most coins are valued only for the silver at about $3.00