Getting garbage loading a csv file into a google sheet using google script

Question

I'm trying to load a csv file into a Google Sheet and getting garbage. I'm using a csv file that looks like this in Notepad:

"Month", "1958", "1959", "1960" "JAN", 340, 360, 417 "FEB", 318, 342, 391 "MAR", 362, 406, 419 "APR", 348, 396, 461

I've tried a few different snippets of code and get the same garbage. Here's the latest code that I'm using:

function appendCSV() {  
    var file = DriveApp.getFilesByName("airtravel.csv").next();
    var csvData = Utilities.parseCsv(file.getBlob().getDataAsString(),',');
    var sheet = SpreadsheetApp.getActiveSheet();
    var lastRow=sheet.getLastRow();
    sheet.getRange(lastRow, 1, csvData.length, csvData[0].length).setValues(csvData);  
    }

Here are the first few lines of the garbage that I'm getting in the google sheet (this web page wouldn't accept more... thought it was un-indented code)

%PDF-1.4 % ���� 4