@property<EOL><INDENT>def mean_rate(self):<DEDENT>
if self.counter.value == <NUM_LIT:0>:<EOL><INDENT>return <NUM_LIT:0.0><EOL><DEDENT>else:<EOL><INDENT>elapsed = time() - self.start_time<EOL>return self.counter.value / elapsed<EOL><DEDENT>
Returns the mean rate of the events since the start of the process.