HibernateStatistics available just for entity which implements UserDetails

When I check hibernate statistics service in jconsole for my Spring MVC application I only have statistics for one entity that implements UserDetails and when I run queries for other entities nothing changes in statistics.
In my config file I have

Code:

---

<context:mbean-server />
   
<context:mbean-export registration="ignoreExisting"/>

<bean id="statisticsService" class="org.hibernate.jmx.StatisticsService">
        <property name="statisticsEnabled" value="true" />
   
            <property name="sessionFactory" ref="sessionFactory"/>
</bean>
       
<bean id="sessionFactory"
                class="org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean">
                <property name="dataSource" ref="dataSource" />
                <property name="packagesToScan" value="com.abc.def.db">

                </property>
                <property name="hibernateProperties">
                        <value>                                                 
                                hibernate.format_sql=true
                                hibernate.show_sql=true
                                hibernate.dialect=org.hibernate.dialect.PostgreSQLDialect
                                hibernate.generate_statistics=true
                        </value>
                </property>
</bean>

---

I tried to add implements Serializable to some entities because UserDetails implements Serializable but still nothing.

How can I get statistics for other entities?