Thanks for responding Daniel. That it is working for you is good news. I copied the code in the AnnotationChart reference you gave into an HTML file and executed it in the 6 browsers. Again, that code executed in all browsers except Safari which just presents a blank screen with a white background. My code follows. It works as intended in all of the mentioned browsers except Safari which presents a blank screen with a white background. I do have what I think is the latest version of Safari for Windows - 5.1.7.
<html>
<head>
<script type='text/javascript'>
google.charts.load('current', {'packages':['annotationchart']});
google.charts.setOnLoadCallback(drawChart);
function drawChart() {
var data = new google.visualization.DataTable();
data.addColumn('date', 'Date');
data.addColumn('number', 'State');
data.addColumn('string', 'title1');
data.addColumn('string', 'text1');
data.addRows([ [new Date(2003,6,1), 44.7, undefined, undefined],
[new Date(2004,0,15), 40.0,'Insurance For All','The Universal Coverage Act of 2003 is proposed.'],
[new Date(2004,6,1), 40.0, undefined, undefined],
[new Date(2005,6,1), 32.9, undefined, undefined],
[new Date(2006,2,1), 33.3,'Insurance Finally','The Universal Coverage Act of 2003 passes.'],
[new Date(2006,6,1), 33.3, undefined, undefined],
[new Date(2007,3,28), 33.1,'Funding Approved','The Universal Coverage Act funding is allocated.'],
[new Date(2007,6,1), 33.1, undefined, undefined],
[new Date(2008,6,1), 34.5, undefined, undefined],
[new Date(2009,6,1), 34.5, undefined, undefined],
[new Date(2009,8,15), 34.5,'Funding Begins','The Universal Coverage Act funding of 2003 begins.'],
[new Date(2010,6,1), 34.5, undefined, undefined],
[new Date(2011,6,1), 34.5, undefined, undefined],
[new Date(2012,6,1), 40.8, undefined, undefined],
[new Date(2013,6,1), 28.8, undefined, undefined],
[new Date(2014,6,1), 31.4, undefined, undefined],
[new Date(2015,6,1), 32.6, undefined, undefined],
[new Date(2016,6,1), 29.2, undefined, undefined],
[new Date(2017,6,1), 29.2, undefined, undefined] ]);
var chart = new google.visualization.AnnotationChart(document.getElementById('chart_div'));
chart.draw(data, {displayAnnotations: true, displayZoomButtons: false, allValuesSuffix: "'%", fill: 40, thickness: 1, colors:['#809FFF'], displayRangeSelector: false});
}
</script>
</head>
<body>
<div id='chart_div' style='width: 800px; height: 380px;position:relative;left:1.5%;'></div>
</body>
</html>