Year	Percent
1960-01-01	-1.74623815710752
1961-01-01	1.56299237392684
1962-01-01	1.09215017084017
1963-01-01	3.08145601867277
1964-01-01	4.47210147080721
1965-01-01	3.18627450998764
1966-01-01	1.78423465718736
1967-01-01	2.09184098667308
1968-01-01	1.86122448972090
1969-01-01	1.25821445737095
1970-01-01	2.88088642660976
1971-01-01	2.22324794223761
1972-01-01	3.61228175799332
1973-01-01	5.19320162691135
1974-01-01	12.84954774541870
1975-01-01	8.37616250629708
1976-01-01	4.88341895790900
1977-01-01	8.43470771895126
1978-01-01	5.74832464618231
1979-01-01	12.13535589260610
1980-01-01	18.06154303559560
1981-01-01	9.40569126142499
1982-01-01	8.98262170616895
1983-01-01	8.25281165848254
1984-01-01	4.72636815920396
1985-01-01	3.36267523608601
1986-01-01	4.35272383207562
1987-01-01	2.48715402223892
1988-01-01	4.49125763640185
1989-01-01	9.85040925769096
1990-01-01	23.32256643664670
1991-01-01	33.97226025358650
1992-01-01	8.75988625255487
1993-01-01	10.74864671637200
1994-01-01	21.72934688381900
1995-01-01	29.46452922815850
1996-01-01	23.83783530733590
1997-01-01	20.19986675549620
1998-01-01	13.66810774858680
1999-01-01	11.66374097913000
2000-01-01	11.04803493449760
2001-01-01	9.67415556864784
2002-01-01	7.69050972034283
2003-01-01	7.67416639397747
2004-01-01	8.11379097093380
2005-01-01	8.80906074819817
2006-01-01	5.57775207654297
2007-01-01	6.93621470895782
2008-01-01	11.40342708139320
2009-01-01	5.49634273772205
2010-01-01	4.69889064976229
2011-01-01	6.76227957314765
2012-01-01	5.19618615531848
2013-01-01	5.16189898581490
2014-01-01	6.12924930313027
2015-01-01	3.15783117980921
2016-01-01	2.72461223295292
2017-01-01	3.93436084442035