1980	14.27	18333.26
1981	14.4	18050.57
1982	14.1	17961.88
1983	14.34	18097.75
1984	14.16	18929.69
1985	14.13	19412.76
1986	14.19	19785.75
1987	14.35	20344.77
1988	14.42	21022.72
1989	14.28	21337.29
1990	14.49	21426.12
1991	14.44	21302
1992	14.16	21246.78
1993	14.18	21501.25
1994	14.31	21650.9
1995	14.47	22033.53
1996	14.36	22513.96
1997	14.4	22909.32
1998	14.71	22848.99
1999	14.44	23193.07
2000	14.41	23851.46
2001	14.56	24121.08
2002	14.7	24448.34
2003	14.64	25664.14
2004	14.6	27043.57