For example, a Sacajawea dollar with the letter "P" mint mark was produced at the Philadelphia Mint, while a coin with the letter "D" mint mark was produced at the Denver Mint. The year 2000 is typically written as simply "00" on Sacajawea dollars.
The mint mark and year are important details to look for when collecting or examining Sacajawea dollars, as they can help to determine the rarity and value of a particular coin.