Change Y Axis Value to Integer (no decimal values) in AmCharts

I have a chart in AmCharts that reflects integer values; as such I want the value in the Y Axis to also be integers however they are showing up as floating point. I have read through documentation and found reference to: numberFormatter with the following syntax: ``` chart.numberFormatter = { precision:-1,decimalSeparator:".",thousandsSeparator:"," }; ``` Changing the precision does not seem to have an impact. I've seen suggestions at setting it to 0 would work for removing the value after the decimal but it does not. I have also read that setting precision to -1 inhibits rounding which confuses me as to what precision is used for. I am using AmCharts version 2.9.3. I have found that there is a bug where numberFormatter is ignored in this version (pre 2.11) when usePrefixes was set to true however that is not the case. I have found references to a parameter called: `digits_after_decimal` However the references I found were for much older versions of AmCharts and the reference was for this parameter in a config file; and I do not see a reference for this in my version. I have done quite a bit of research and am looking for any pointers as to what I am doing wrong as I know this is simply a misunderstanding of the API. I have also been toying with a JSFiddle example from AmCharts site: http://jsfiddle.net/amcharts/zu9nW/