Show total sales in WooCommerce shop archives for each product

I have added this code to my website to show the number of product buy by my clients for each products of my store.

I would like to show the number of sales only if the product has been bought maybe 5 times (to never show "buy 0 time")…

So I have this code:

add_action( 'woocommerce_after_shop_loop_item', 'wpm_product_sold_count', 11 );

function wpm_product_sold_count() {
    global $product;
    $units_sold = get_post_meta( $product->id, 'total_sales', true );
    if ($units_sold > 5) {
        echo '<p class="sold-product">' . sprintf( __( 'Produit vendu: %s fois', 'woocommerce' ), $units_sold ) . '</p>';
    }
}

But it isn't working. Do you have any tips please?

Thanks