def read_cumulative_iss_index():
indexdir = get_index_dir()<EOL>path = indexdir / "<STR_LIT>"<EOL>try:<EOL><INDENT>df = pd.read_hdf(path, "<STR_LIT>")<EOL><DEDENT>except FileNotFoundError:<EOL><INDENT>path = indexdir / "<STR_LIT>"<EOL>df = pd.read_hdf(path, "<STR_LIT>")<EOL><DEDENT>df = df.replace(-<NUM_LIT>, np.nan)<EOL>return df.replace(-<NUM_LIT>, np.nan)<EOL>
Read in the whole cumulative index and return dataframe.