Data runs from 1950 to near the end of 2018.
Date - Date of the form "YYYY-MM-DD".
Open - Opening price.
High - Highest price of the day.
Low - Lowest price of the day.
Close - Closing price of the day.
Adj.Close - Adjusted price at close after accounting for dividends paid out.
Volume - Trading volume.
Source
http://finance.yahoo.com
Use the following R code to directly access this dataset in R.