year |
pollutant_name |
index |
1990 |
SOx excluding international shipping |
100.0 |
1991 |
SOx excluding international shipping |
95.2 |
1992 |
SOx excluding international shipping |
97.0 |
1993 |
SOx excluding international shipping |
96.1 |
1994 |
SOx excluding international shipping |
93.0 |
1995 |
SOx excluding international shipping |
80.6 |
1996 |
SOx excluding international shipping |
74.8 |
1997 |
SOx excluding international shipping |
58.6 |
1998 |
SOx excluding international shipping |
59.6 |
1999 |
SOx excluding international shipping |
56.8 |
2000 |
SOx excluding international shipping |
37.6 |
2001 |
SOx excluding international shipping |
36.5 |
2002 |
SOx excluding international shipping |
31.0 |
2003 |
SOx excluding international shipping |
32.1 |
2004 |
SOx excluding international shipping |
30.6 |
2005 |
SOx excluding international shipping |
22.6 |
2006 |
SOx excluding international shipping |
24.0 |
2007 |
SOx excluding international shipping |
22.2 |
2008 |
SOx excluding international shipping |
19.6 |
2009 |
SOx excluding international shipping |
20.1 |
2010 |
SOx excluding international shipping |
14.4 |
2011 |
SOx excluding international shipping |
14.3 |
2012 |
SOx excluding international shipping |
13.1 |
2013 |
SOx excluding international shipping |
12.8 |
2014 |
SOx excluding international shipping |
12.2 |
2015 |
SOx excluding international shipping |
11.7 |