Year	mm Hg
1980	126
1981	126.3
1982	126.5
1983	126.6
1984	126.7
1985	126.8
1986	126.9
1987	127.1
1988	127.3
1989	127.4
1990	127.6
1991	127.7
1992	127.9
1993	128
1994	128.2
1995	128.4
1996	128.5
1997	128.7
1998	128.8
1999	128.9
2000	129
2001	129.1
2002	129.2
2003	129.2
2004	129.4
2005	129.5
2006	129.7
2007	129.8
2008	130