Array
(
    [sheets] => Array
        (
            [2] => Demo1
            [1] => Demo2
        )

    [#1] => Array
        (
            [4] => Array
                (
                    [B] => Name
                    [Birthday] => Date
                    [D] => Color
                )

            [5] => Array
                (
                    [B] => Giovanni
                    [Birthday] => 1970-08-01
                    [D] => Red
                )

            [6] => Array
                (
                    [B] => James
                    [Birthday] => 1969-12-23
                    [D] => Green
                )

            [7] => Array
                (
                    [B] => Mateusz
                    [Birthday] => 1968-01-13
                    [D] => Blue
                )

            [8] => Array
                (
                    [B] => Francesco
                    [Birthday] => 1971-03-25
                    [D] => Brown
                )

            [9] => Array
                (
                    [B] => Miguel
                    [Birthday] => 1973-04-04
                    [D] => Yellow
                )

            [10] => Array
                (
                    [B] => Pedro
                    [Birthday] => 1967-08-07
                    [D] => Orange
                )

            [11] => Array
                (
                    [B] => Evan
                    [Birthday] => 1965-10-15
                    [D] => Purple
                )

        )

    [#2] => Array
        (
            [0] => Array
                (
                    [year] => 2000
                    [value1] => 235
                    [value2] => 81.955861416002
                )

            [1] => Array
                (
                    [year] => 2001
                    [value1] => 859
                    [value2] => 64.13799789082
                )

            [2] => Array
                (
                    [year] => 2002
                    [value1] => 642
                    [value2] => 180.71226210095
                )

            [3] => Array
                (
                    [year] => 2003
                    [value1] => 780
                    [value2] => 447.57921566992
                )

            [4] => Array
                (
                    [year] => 2004
                    [value1] => 769
                    [value2] => 300.04310032896
                )

            [5] => Array
                (
                    [year] => 2005
                    [value1] => 682
                    [value2] => 163.23790992567
                )

            [6] => Array
                (
                    [year] => 2006
                    [value1] => 392
                    [value2] => 304.77290774286
                )

            [7] => Array
                (
                    [year] => 2007
                    [value1] => 216
                    [value2] => 120.17578666695
                )

            [8] => Array
                (
                    [year] => 2008
                    [value1] => 674
                    [value2] => 103.6210868576
                )

            [9] => Array
                (
                    [F] => 2009
                    [G] => 433
                    [H] => 333.14716577167
                )

            [10] => Array
                (
                    [F] => 2010
                    [G] => 365
                    [H] => 361.04943821519
                )

            [11] => Array
                (
                    [F] => 2011
                    [G] => 705
                    [H] => 684.10559098745
                )

            [12] => Array
                (
                    [F] => 2012
                    [G] => 236
                    [H] => 75.788099017386
                )

            [13] => Array
                (
                    [F] => 2013
                    [G] => 107
                    [H] => 25.216493632314
                )

            [14] => Array
                (
                    [F] => 2014
                    [G] => 523
                    [H] => 407.96178422724
                )

            [15] => Array
                (
                    [F] => 2015
                    [G] => 503
                    [H] => 59.432700113872
                )

            [16] => Array
                (
                    [F] => 2016
                    [G] => 810
                    [H] => 560.8066769148
                )

            [17] => Array
                (
                    [F] => 2017
                    [G] => 334
                    [H] => 93.410923396311
                )

        )

)
1