Year	Percent Change
1988-01-01	78.98663028208660
1989-01-01	88.58955489497450
1990-01-01	82.60874052212910
1991-01-01	78.77824869905540
1992-01-01	53.93824089264250
1993-01-01	56.69145382514060
1994-01-01	63.81306468352240
1995-01-01	58.29664592974890
1996-01-01	127.35868631194300
1997-01-01	95.86475708245200
1998-01-01	55.75004114001440
1999-01-01	103.85300451617500
2000-01-01	36.05884689138080
2001-01-01	52.43532087269250
2002-01-01	32.34684775594480
2003-01-01	22.70643075127320
2004-01-01	12.16595609601930
2005-01-01	3.50686696377646
2006-01-01	1.20992633447601