I was having trouble finding data comparing STEEM to SBD, so I decided to calculate it myself based on data found at Coinmarketcap.com. Depending on how useful the chart proves to be, I plan to update it periodically.
STEEM to SBD
STEEM to USD
SBD to USD
SBD Price Information - https://coinmarketcap.com/currencies/steem-dollars/historical-data/
STEEM Price Information - https://coinmarketcap.com/currencies/steem/historical-data/