While there have been several dividend indexes such as the Dividend Aristocrats and the Dividend Achievers, which have dividend ETFs that provide accurate information on dividend and price returns, these have not been around as much as the broad S&P 500 index. In addition to that the S&P 500 is sector diversified, and most information is widely available. Because of that, I would consider the changes in annual dividend income of the S&P 500 index as an important barometer against which to benchmark your dividend income over time.
Over the past 32 years, S&P 500 dividends have grown by 5% per year on average.
Below you could find a complete breakdown of annual changes in reported dividends of the S&P 500 companies:
The top ten holdings of S&P 500 have an almost 19% weight in the index. All of them pay dividends except for Apple Computers (AAPL), although three of them have cut distributions over the past one year. It is expected in a dividend portfolio that even some of the best dividend stocks are susceptible to dividend cuts or eliminations. General Electric (GE) and Bank of America (BAC) are two such examples of former dividend aristocrats which had to cut distributions during the financial crisis of 2007-2009. Many income investors which had an allocation to financial stocks, suffered similar drops in dividend income in 2008 and 2009.
Other companies such as International Business Machines (IBM), Johnson & Johnson (JNJ), Procter & Gamble (PG), AT&T (T) and Exxon-Mobil (XOM) continue raising dividends, despite the broad economic slowdown. Because of their large size, the companies in the S&P 500 are representative for most dividend stocks commonly held by dividend investors.
Full Disclosure: Long CVX, PG, JNJ and XOM