Monthly mean values at the tropopause for: 
temp. (deg C), potential temp. (deg.K), press. (hPa), alt. (km) and ozone (ppb)
and the number of soundings per month
-72.67 -75.90 -77.18 -76.07 -75.41 -77.00 -75.79 -74.55 -76.62 -78.00 -78.53 -77.56
380.73 380.91 385.84 387.86 376.35 378.32 374.49 379.11 374.61 378.33 380.49 378.25
108.86 100.91  94.25  94.45 107.09 100.98 106.85 104.55 105.16  99.32  96.08 100.16
16.05 16.41 16.86 16.94 16.25 16.64 16.34 16.47 16.39 16.66 16.78 16.49
120.49 120.75 108.54 149.02 133.40 128.84 126.84 142.11  83.86  92.79  98.13  99.33
12 10 11 15 17 12 14 11 16 18 15 18