Array
(
    [0] => 2025
    [1] => Array
        (
            [0] => 2025
            [1] => 2023
            [2] => 2022
            [3] => 2021
        )

    [2] => Array
        (
            [0] => 2022
        )

    [3] => Array
        (
        )

    [4] => Array
        (
            [yearly_subscription] => Array
                (
                    [0] => 2022
                )

            [yearly_subscription_purchased_date] => Array
                (
                    [0] => 2022-03-13 08:27:20
                )

            [monthly_subscription_data] => Array
                (
                )

            [semiannual_subscription_data] => Array
                (
                )

        )

)