Woodland Hills healthcare insurance provider Health Net reported second quarter earnings rose 43.8 percent from a year ago. The company earned $77 million, or $0.65 per diluted shared, compared to $53.6 million, or $0.47 a share, in 2005. Revenue rose 8.2 percent from last year to $3.27 billion, the company said. The company credited the gains to increases in enrollment.