For the 100 largest public-employee retirement systems in the country, cash and security holdings totaled $2,930.3 billion in the first quarter of 2013, passing the 2007 fourth quarter peak of $2,928.9 billion, and reaching the highest level since this survey began collecting data in 1968. Cash and security holdings had a quarter-to-quarter increase of 3.4 percent from $2,834.1 billion last quarter, and a year-to-year increase of 6.0 percent, from $2,764.9 billion in the first quarter of 2012. Earnings on investments totaled $115.5 billion in the first quarter of 2013.