Report shows vulnerability to only 2 decimal places about pyfair HOT 7 CLOSED

import pyfair

# Create using LEF (PERT), PL, (PERT), and SL (constant)
model1 = pyfair.FairModel(name="Regular Model 1", n_simulations=10_000)
model1.input_data('Threat Event Frequency', low=20, most_likely=100, high=900)
model1.input_data('Loss Magnitude', low=3_000_000, most_likely=3_500_000, high=5_000_000)
model1.input_data('Vulnerability', low=.011, most_likely=.225, high=.934)
model1.calculate_all()

# Create report comparing 2 vs metamodel.
fsr = pyfair.FairSimpleReport([model1])

################################################################
# Change your vuln format string
fsr._format_strings['Vulnerability'] = '{0:.3f}'
################################################################

# Output stuff
fsr.to_html('output.html')

class FairBaseReport(object):
    """A base class for creating FairModel and FairMetaModel reports
    This class exists to provide a common base for mutliple report types.
    It carries with it formatting data, file paths, and a variety of 
    methods for creating report components. It is not intended to be
    instantiated on its own.
    """
    def __init__(self, currency_prefix='$'):
        # Add formatting strings
        self._currency_prefix = currency_prefix
        self._model_or_models = None
        self._currency_format_string     = currency_prefix + '{0:,.0f}'
        self._float_format_string      = '{0:.2f}'
        self._format_strings = {
            'Risk'                           : self._currency_format_string,
            'Loss Event Frequency'           : self._float_format_string,
            'Threat Event Frequency'         : self._float_format_string,
            'Vulnerability'                  : self._float_format_string,         
            'Contact Frequency'              : self._float_format_string,
            'Probability of Action'          : self._float_format_string,
            'Threat Capability'              : self._float_format_string,
            'Control Strength'               : self._float_format_string,
            'Loss Magnitude'                 : self._currency_format_string,
            'Primary Loss'                   : self._currency_format_string,
            'Secondary Loss'                 : self._currency_format_string,
            'Secondary Loss Event Frequency' : self._float_format_string,
            'Secondary Loss Event Magnitude' : self._currency_format_string,
        }