Henry 12Z pressure
1993       -   690.4   690.8   688.0   684.4   684.1   681.9       -       -       -   692.8   691.2
1994   698.0   689.9   685.4   692.1   685.1   701.0   685.6       -       -       -   695.4   690.2
1995   691.3   692.1   691.5   686.0   682.0   691.0   696.4       -       -       -   693.6   693.3
1996   698.4   698.5   688.6   691.4   687.4   688.0   685.2   696.9       -       -   697.4   699.8
1997   698.0   691.6   683.9   689.5   683.5   689.4   679.3   684.2       -       -   702.4   697.0
1998   696.7   693.9   688.7   678.8   685.5   690.3   684.1   682.8       -       -   688.0   693.0
1999   700.7   695.1   691.5   682.1   685.9   698.6   685.6   684.9       -       -   689.8   688.9
2000   691.1   690.7   691.5   689.9   686.3   691.6   687.8   687.1       -       -   697.8   701.3
2001   697.3   698.1   688.5   686.0   691.0   689.8   689.6   679.7       -       -   691.4   693.1
2002   696.4   690.8   695.0   689.5   696.6   687.7   690.7   679.6       -       -   688.6   690.7
2003   704.0       -       -       -   691.8       -       -       -       -       -       -       -
2004       -       -       -       -       -       -       -       -       -       -       -       -
2005       -   691.8   693.0   688.9   690.8   694.2   686.4       -       -       -   691.2   707.0
2006   698.6       -       -       -       -       -       -       -       -       -       -       -
2007       -       -       -       -       -       -       -       -       -       -       -       -
2008       -       -       -       -       -       -       -       -       -       -       -       -
2009       -       -       -       -       -       -       -       -       -       -       -       -