NEW YORK — Americans are living longer than ever before, according to a new government report filled mostly with good news. U.S. life expectancy inched up again and death rates fell. Rates also fell for most of the leading causes of death with one exception – the suicide rate reached its highest point in 25 years. That figure has been increasing since 2000 and “it’s really hard to say why,” said Robert Anderson, who oversees the Centers for Disease Prevention and Control branch that issued the report. The report looked at deaths in 2012. It found U.S. life expectancy for a child born in 2012 was 78 years and 91/2 months, up about six weeks from life expectancy in 2010 and 2011.