Henry 00Z pressure
1993       -   690.5   690.5   688.4   684.6   684.2   682.1       -       -       -   693.0   691.1
1994   698.2   690.2   685.4   692.4   684.8   701.0   686.1       -       -       -   695.5   690.4
1995   691.2   692.0   691.7   686.2   682.4   691.0   695.7   687.3       -       -   693.4   693.3
1996   698.1   699.0   688.9   691.4   687.4   688.0   685.3   696.8       -       -   697.3   700.0
1997   698.1   692.5   683.8   689.6   683.8   689.0   679.5   684.1       -       -   701.9   697.3
1998   696.7   694.0   688.9   679.0   685.6   689.8   684.7   682.7       -       -   687.7   693.2
1999   700.7   695.4   691.6   682.5   685.6   698.7   685.5   685.1       -       -   690.0   688.8
2000   691.0   691.2   691.3   690.3   686.6   691.8   687.4   686.9       -       -   697.2   701.5
2001   697.3   698.2   689.0   685.8   691.2   689.9   689.8   679.9       -       -   691.5   692.8
2002   696.4   690.7   694.9   690.0   696.5   687.9   690.9   679.3       -       -   689.2   690.5
2003       -       -       -       -       -   694.3   688.5       -       -       -       -       -
2004       -       -       -       -       -       -   675.8       -       -       -       -       -
2005   701.3   691.6   693.5   689.1   691.3   693.8   686.8       -       -       -   691.4   707.3
2006   698.7       -       -       -       -       -       -       -       -       -       -       -
2007       -       -       -       -       -       -       -       -       -       -       -       -
2008       -       -       -       -       -       -       -       -       -       -       -       -
2009       -       -       -       -       -       -       -       -       -       -       -       -