f:facet>
                        </p:column>

                        <!--                        <p:columnGroup type="footer">  
                                                    <p:row>                              
                                                        <p:column footerText="Total" colspan="1"/>
                                                        <p:column footerText="#{investigationMonthSummeryOwnController.countTotal}"  style="text-align:right">
                                  