For the 100 largest public-employee retirement systems in the country, cash and security holdings totaled $3,061.0 billion in the third quarter of 2013, reaching the highest level since the survey began in 1968. Cash and security holdings had a quarter-to-quarter increase of 4.0 percent, from $2,944.3 billion last quarter, and a year-to-year increase of 9.8 percent, from $2,788.1 billion in the third quarter of 2012. Earnings on investments totaled $120.1 billion in the third quarter of 2013.