Year,Jan.,Feb.,Mar.,Apr.,May.,Jun.,Jul.,Aug.,Sep.,Oct.,Nov.,Dec.,24-Hour Annual Avg., 1990,1599,1713,1918,2079,2229,2584,2879,2782,2381,2241,1863,1568,2156, 1991,1470,1679,1745,1906,2085,2454,2915,2874,2356,2293,1721,1644,2099, 1992,1604,1752,1998,2068,2405,2646,2992,2897,2485,2425,1900,1722,2250, 1993,1542,1700,1989,2169,2437,2666,3043,3044,2684,2567,2066,1876,2319, 1994,1783,1835,2181,2404,2743,3058,3466,3406,3035,3009,2494,2395,2656, 1995,2217,2395,2550,2837,3040,3381,3704,3754,3359,3150,2504,2314,2934, 1996,2009,2124,2435,2665,3124,3295,3575,3479,3142,3031,2415,2152,2787, 1997,2072,2195,2447,2663,3040,3291,3677,3605,3244,3038,2543,2165,2832, 1998,1962,2070,2391,2631,2892,3101,3637,3698,3092,2849,2398,2070,2733, 1999,2011,2041,2364,2547,2731,3085,3588,3344,3007,2780,2334,1969,2650, 2000,1875,1997,2279,2476,2626,3120,3652,4199,3808,2706,2177,1992,2742, 2001,1916,2026,2379,2500,2817,3045,3430,3305,2876,2727,2438,1970,2619, 2002,1907,2012,2348,2648,2898,3081,3333,3276,2847,2766,2268,2071,2621, 2003,1987,2018,2356,2525,2838,3214,3627,3590,2968,2867,2327,2163,2707, 2004,1971,2076,2515,2686,2823,3224,3503,3510,3098,2933,2509,2228,2756, 2005,2004,2266,2467,2657,2904,3180,3589,3516,2964,2782,2384,2102,2735, 2006,2000,2148,2441,2611,2774,3118,3466,3323,2932,2844,2448,2148,2688, 2007,2074,2118,2445,2596,2831,3181,3415,3324,2942,2969,2444,2064,2700, 2008,1910,2091,2295,2477,2681,2933,3277,2906,2763,2688,2254,1995,2523, 2009,1851,2043,2207,2450,2663,3011,3399,3060,2835,2693,2276,2052,2545, 2010,1824,2007,2331,2429,2499,2920,3403,3107,2821,2727,2226,1948,2520, 2011,1869,1961,2160,2309,2476,2701,3191,3114,3051,2667,2128,1967,2466, 2012,1839,1942,2115,2313,2540,2920,3330,3167,2737,2624,2170,1904,2467, 2013,1754,1917,2150,2308,2568,2974,3283,3174,2775,2542,2141,1890,2456, 2014,1800,1778,2126,2357,2584,2958,3259,3043,2759,2647,2071,1918,2441, 2015,1821,2047,2345,2531,2856,3348,3355,3137,2865,2763,2198,1935,2600, 2016,1847,2014,2328,2568,2801,3268,3461,3253,2982,2764,2352,1909,2629, 2017,1771,1917,2262,2524,2909,3251,3467,3569,2954,2852,2360,2099,2661, 2018,2039,2078,2356,2673,2941,3477,3551,3444,3078,2937,2395,2113,2757, 2019,1968,1944,2224,2598,2862,3217,3559,3512,3056,2615,2347,2129,2669, 2020,1895,1895,2066,2222,2759,3230,3689,3423,3184,2943,2260,2137,2642, 2021,2044,2023,2467,2877,3170,3696,4028,3545,3188,3002,2457,2212,2892, 2022,1950,2158,2481,2692,3045,3373,3875,3947,3608,3345,2498,2231,2934, 2023,2225,2400,2411,2771,3148,3484,3845,3497,3247,3021,2472,2188,2892, 2024,2030,2220, , , , , , , , , , , ,