<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def base_mortality_rate(self, index: pd.Index) -> pd.Series: """Computes the base mortality rate for every individual. Parameters index : A representation of the simulants to compute the base mortality rate for. Returns ------- The base mortality rate for all simulants in the index. """

        return pd.Series(self.config.mortality_rate, index=index)