{
	"0":"NULL",
	"1":"Output from digitization project, semi-colon delimited format (1955)",
	"2":"Output from digitization project, semi-colon delimited format (1956)",
	"3":"Output from digitization project, semi-colon delimited format (1957,1967)",
	"4":"Output from digitization project, semi-colon delimited format (1968 to 1969)",
	"5":"Fixed format (1970Ð94)",
	"6":"Semicolon delimited format (1995 to 2001)",
	"7":"Semicolon delimited format (2002 to 2007 q1)",
	"8":"Semicolon delimited format (2007 q2 - 2008)",
	"9":"Semicolon delimited format (2009 - 2014)"
}