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
-65.43 -64.88 -60.47 -54.43 -49.78 -51.50 -50.69 -53.64 -54.13 -55.29 -60.89 -62.40
304.60 307.10 306.15 299.94 308.14 315.72 319.73 320.35 314.94 309.21 310.32 306.97
265.19 259.38 283.50 332.79 326.72 294.33 283.94 268.86 284.13 296.43 270.37 271.43
9.14 9.35 8.94 7.85 8.25 9.20 9.45 9.76 9.26 8.71 9.38 9.11
110.38 139.80 120.80  95.82 138.39 124.65 134.12 133.94 104.10 118.89  89.50  97.32
21 16 30 14 18 12 16 14 15 14 19 35