Recycler view por baixo da toolbar

Bom dia pessoal, estou criando meu recycler view dentro de um Coordinator layout que por sua vez esta dentro de um DrawerLayout

segue meu xml:

<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.widget.DrawerLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/drawer_layout"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:fitsSystemWindows="true"
    tools:context=".ui.ListaOcorrenciasActivity"
    tools:openDrawer="start">

    <android.support.design.widget.CoordinatorLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent">

        <android.support.constraint.ConstraintLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent">

            <include layout="@layout/toolbar" />

            <android.support.v7.widget.RecyclerView
                android:id="@+id/lista_ocorrencias_recycler_view"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                app:layoutManager="android.support.v7.widget.LinearLayoutManager"
                app:layout_constraintBottom_toBottomOf="parent"
                app:layout_constraintEnd_toEndOf="parent"
                app:layout_constraintStart_toStartOf="parent"
                app:layout_constraintTop_toBottomOf="@+id/toolbar"
                tools:listitem="@layout/item_ocorrencia">

            </android.support.v7.widget.RecyclerView>


        </android.support.constraint.ConstraintLayout>


        <android.support.design.widget.FloatingActionButton
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="bottom|end"
            android:layout_margin="16dp"
            android:elevation="@dimen/cardview_default_elevation"
            android:src="@drawable/ic_add" />
    </android.support.design.widget.CoordinatorLayout>


    <android.support.design.widget.NavigationView
        android:id="@+id/navigation_view"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_gravity="start"
        app:headerLayout="@layout/navigation_header"
        app:menu="@menu/menu_nav" />
</android.support.v4.widget.DrawerLayout>

Meu problema eh que meu recycler view não fica correto conforme print:

http://prntscr.com/j6wa16

O primeiro item já aparece cortado pela toolbar, e o ultimo também esta cortado http://prntscr.com/j6wahf

o que estou fazendo errado?