year |
pollutant_name |
index |
1990 |
SOx excluding international shipping |
100.0 |
1991 |
SOx excluding international shipping |
95.4 |
1992 |
SOx excluding international shipping |
96.3 |
1993 |
SOx excluding international shipping |
93.8 |
1994 |
SOx excluding international shipping |
90.7 |
1995 |
SOx excluding international shipping |
77.6 |
1996 |
SOx excluding international shipping |
70.8 |
1997 |
SOx excluding international shipping |
54.5 |
1998 |
SOx excluding international shipping |
54.4 |
1999 |
SOx excluding international shipping |
50.3 |
2000 |
SOx excluding international shipping |
40.3 |
2001 |
SOx excluding international shipping |
37.8 |
2002 |
SOx excluding international shipping |
32.7 |
2003 |
SOx excluding international shipping |
32.9 |
2004 |
SOx excluding international shipping |
31.1 |
2005 |
SOx excluding international shipping |
25.3 |
2006 |
SOx excluding international shipping |
24.4 |
2007 |
SOx excluding international shipping |
22.3 |
2008 |
SOx excluding international shipping |
19.6 |
2009 |
SOx excluding international shipping |
17.4 |
2010 |
SOx excluding international shipping |
14.8 |
2011 |
SOx excluding international shipping |
13.8 |
2012 |
SOx excluding international shipping |
11.9 |
2013 |
SOx excluding international shipping |
11.9 |
2014 |
SOx excluding international shipping |
12.0 |
2015 |
SOx excluding international shipping |
10.7 |
2016 |
SOx excluding international shipping |
11.8 |