_date_	wor	frp
1964-01-01	2090	91.65
1965-01-01	12091	91.65
1966-01-01	16646	91.65
1967-01-01	16631	91.65
1968-01-01	19923	91.65
1969-01-01	24535	91.65
1970-01-01	26810	91.65
1971-01-01	27853	91.65
1972-01-01	26953	91.65
1973-01-01	30753	86.00
1974-01-01	28192	123.14
1975-01-01	25597	126.86
1976-01-01	27382	153.19
1977-01-01	28413	165.75
1978-01-01	27693	183.30
1979-01-01	28055	190.03
1980-01-01	30998	218.56
1981-01-01	31695	288.46
1982-01-01	29597	350.25
1983-01-01	30347	372.60
1984-01-01	33228	405.68
1985-01-01	35143	435.70
1986-01-01	40996	510.83
1987-01-01	38000	461.77
1988-01-01	27503	420.64
1989-01-01	33121	375.55
1990-01-01	18606	330.49
1991-01-01	13859	339.88
1992-01-01	5800	301.78
1993-01-01	1300	279.80
1994-01-01	2951	282.00
1995-01-01	13848	280.02
1996-01-01	27560	299.38
1997-01-01	28275	199.89
1998-01-01	30951	167.97
1999-01-01	24348	159.79
2000-01-01	30490	249.54
2001-01-01	47161	246.32
2002-01-01	69193	265.30
2003-01-01	83220	423.53
2004-01-01	124218	410.49
2005-01-01	140083	486.00
2006-01-01	143735	783.39
2007-01-01	137390	633.58
2008-01-01	133441	855.71
2009-01-01	103390	517.88
2010-01-01	94303	731.14
2011-01-01	92799	983.73
2012-01-01	84929	910.46
2013-01-01	82417	781.72
2014-01-01	88161	810.14
2015-01-01	95087	652.56
2016-01-01	65803	368.30