Average total-column ozone values for October, Halley Station, 1957-2015
Column ozone
1957322
1958306
1959303
1960293
1961309
1962323
1963301
1964310
1965274
1966308
1967315
1968293
1969275
1970275
1971291
1972296
1973271
1974272
1975303
1976283
1977251
1978284
1979263
1980226
1981237
1982218
1983195
1984194
1985185
1986233
1987150
1988216
1989150
1990173
1991137
1992147
1993122
1994126
1995130
1996148
1997141
1998140
1999143
2000137
2001138
2002224
2003158
2004191
2005155
2006137
2007159
2008145
2009165
2010184
2011140
2012179
2013177
2014148
2015139