How make animation increase of number

i make this:

$(window).scroll(function() {
    var currentNumber = $('.js-number-lifetime').text(),
        targetNumber = $('.js-number-lifetime').attr('data-target');
    $({numberValue: currentNumber}).animate({numberValue: targetNumber}, {
        duration: 1000,
        easing: 'linear',
        step: function() {
            $('.js-number-lifetime').text(Math.ceil(this.numberValue));
        }
    });

    var currentNumber1 = $('.js-number-clients').text(),
        targetNumber1 = $('.js-number-clients').attr('data-target');
    $({numberValue: currentNumber1}).animate({numberValue: targetNumber1}, {
        duration: 1000,
        easing: 'linear',
        step: function() {
            $('.js-number-clients').text(Math.ceil(this.numberValue));
        }
    });

    var currentNumber2 = $('.js-number-employee').text(),
        targetNumber2 = $('.js-number-employee').attr('data-target');
    $({numberValue: currentNumber2}).animate({numberValue: targetNumber2}, {
        duration: 1000,
        easing: 'linear',
        step: function() {
            $('.js-number-employee').text(Math.ceil(this.numberValue));
        }
    });
});